diff --git a/src/webui/www/private/addpeers.html b/src/webui/www/private/addpeers.html
index 4a23ace3d..a86673d14 100644
--- a/src/webui/www/private/addpeers.html
+++ b/src/webui/www/private/addpeers.html
@@ -14,11 +14,11 @@
             defaultEventType: 'keydown',
             events: {
                 'Escape': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 },
                 'Esc': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 }
             }
@@ -49,7 +49,7 @@
                         alert("QBT_TR(Unable to add peers. Please ensure you are adhering to the IP:port format.)QBT_TR[CONTEXT=HttpServer]");
                     },
                     onSuccess: function() {
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                     }
                 }).send();
             });
@@ -62,7 +62,7 @@
         <p>QBT_TR(List of peers to add (one IP per line):)QBT_TR[CONTEXT=PeersAdditionDialog]</p>
         <textarea id="peers" rows="10" style="width: 100%;" placeholder="QBT_TR(Format: IPv4:port / [IPv6]:port)QBT_TR[CONTEXT=PeersAdditionDialog]"></textarea>
         <div style="margin-top: 10px; text-align: center;">
-            <button type="button" onclick="parent.closeWindows();">QBT_TR(Cancel)QBT_TR[CONTEXT=PeersAdditionDialog]</button>
+            <button type="button" onclick="parent.qBittorrent.Client.closeWindows();">QBT_TR(Cancel)QBT_TR[CONTEXT=PeersAdditionDialog]</button>
             <button type="button" id="addPeersOk">QBT_TR(Ok)QBT_TR[CONTEXT=PeersAdditionDialog]</button>
         </div>
     </div>
diff --git a/src/webui/www/private/addtrackers.html b/src/webui/www/private/addtrackers.html
index 5bf5670cf..e22cf078b 100644
--- a/src/webui/www/private/addtrackers.html
+++ b/src/webui/www/private/addtrackers.html
@@ -15,11 +15,11 @@
                 defaultEventType: 'keydown',
                 events: {
                     'Escape': function(event) {
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                         event.preventDefault();
                     },
                     'Esc': function(event) {
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                         event.preventDefault();
                     }
                 }
@@ -37,7 +37,7 @@
                         urls: $('trackersUrls').value
                     },
                     onComplete: function() {
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                     }
                 }).send();
             });
diff --git a/src/webui/www/private/confirmdeletion.html b/src/webui/www/private/confirmdeletion.html
index 2170d9b51..9c5038624 100644
--- a/src/webui/www/private/confirmdeletion.html
+++ b/src/webui/www/private/confirmdeletion.html
@@ -75,7 +75,7 @@
             $('cancelBtn').focus();
             $('cancelBtn').addEvent('click', function(e) {
                 new Event(e).stop();
-                window.parent.closeWindows();
+                window.parent.qBittorrent.Client.closeWindows();
             });
             $('confirmBtn').addEvent('click', function(e) {
                 parent.torrentsTable.deselectAll();
@@ -90,7 +90,7 @@
                         'deleteFiles': deleteFiles
                     },
                     onComplete: function() {
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                     }
                 }).send();
             });
diff --git a/src/webui/www/private/confirmfeeddeletion.html b/src/webui/www/private/confirmfeeddeletion.html
index dba355316..053cacc3d 100644
--- a/src/webui/www/private/confirmfeeddeletion.html
+++ b/src/webui/www/private/confirmfeeddeletion.html
@@ -15,7 +15,7 @@
             $('cancelBtn').focus();
             $('cancelBtn').addEvent('click', (e) => {
                 new Event(e).stop();
-                window.parent.closeWindows();
+                window.parent.qBittorrent.Client.closeWindows();
             });
             $('confirmBtn').addEvent('click', (e) => {
                 new Event(e).stop();
@@ -32,7 +32,7 @@
                             ++completionCount;
                             if (completionCount === paths.length) {
                                 window.parent.qBittorrent.Rss.updateRssFeedList();
-                                window.parent.closeWindows();
+                                window.parent.qBittorrent.Client.closeWindows();
                             }
                         }
                     }).send();
diff --git a/src/webui/www/private/download.html b/src/webui/www/private/download.html
index 913a10001..13caf8526 100644
--- a/src/webui/www/private/download.html
+++ b/src/webui/www/private/download.html
@@ -187,7 +187,7 @@
 
         $('download_frame').addEventListener("load", function() {
             if (submitted)
-                window.parent.closeWindows();
+                window.parent.qBittorrent.Client.closeWindows();
         });
     </script>
     <div id="download_spinner" class="mochaSpinner"></div>
diff --git a/src/webui/www/private/downloadlimit.html b/src/webui/www/private/downloadlimit.html
index fa49266dd..35e127363 100644
--- a/src/webui/www/private/downloadlimit.html
+++ b/src/webui/www/private/downloadlimit.html
@@ -36,7 +36,7 @@
                         },
                         onComplete: function() {
                             window.parent.updateMainData();
-                            window.parent.closeWindows();
+                            window.parent.qBittorrent.Client.closeWindows();
                         }
                     }).send();
                 }
@@ -49,7 +49,7 @@
                             'limit': limit
                         },
                         onComplete: function() {
-                            window.parent.closeWindows();
+                            window.parent.qBittorrent.Client.closeWindows();
                         }
                     }).send();
                 }
@@ -67,11 +67,11 @@
                     event.preventDefault();
                 },
                 'Escape': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 },
                 'Esc': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 }
             }
diff --git a/src/webui/www/private/edittracker.html b/src/webui/www/private/edittracker.html
index 17d2a92d2..feb5f5766 100644
--- a/src/webui/www/private/edittracker.html
+++ b/src/webui/www/private/edittracker.html
@@ -19,11 +19,11 @@
                         event.preventDefault();
                     },
                     'Escape': function(event) {
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                         event.preventDefault();
                     },
                     'Esc': function(event) {
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                         event.preventDefault();
                     }
                 }
@@ -48,7 +48,7 @@
                         newUrl: $('trackerUrl').value
                     },
                     onComplete: function() {
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                     }
                 }).send();
             });
diff --git a/src/webui/www/private/newcategory.html b/src/webui/www/private/newcategory.html
index 63186e013..8fa1986aa 100644
--- a/src/webui/www/private/newcategory.html
+++ b/src/webui/www/private/newcategory.html
@@ -19,11 +19,11 @@
                     event.preventDefault();
                 },
                 'Escape': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 },
                 'Esc': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 }
             }
@@ -89,7 +89,7 @@
                                         category: categoryName
                                     },
                                     onComplete: function() {
-                                        window.parent.closeWindows();
+                                        window.parent.qBittorrent.Client.closeWindows();
                                     }
                                 }).send();
                             },
@@ -111,7 +111,7 @@
                                 savePath: savePath
                             },
                             onComplete: function() {
-                                window.parent.closeWindows();
+                                window.parent.qBittorrent.Client.closeWindows();
                             }
                         }).send();
                         break;
@@ -124,7 +124,7 @@
                                 savePath: savePath
                             },
                             onComplete: function() {
-                                window.parent.closeWindows();
+                                window.parent.qBittorrent.Client.closeWindows();
                             }
                         }).send();
                         break;
diff --git a/src/webui/www/private/newfeed.html b/src/webui/www/private/newfeed.html
index 4f6204a9d..496e68940 100644
--- a/src/webui/www/private/newfeed.html
+++ b/src/webui/www/private/newfeed.html
@@ -19,11 +19,11 @@
                     event.preventDefault();
                 },
                 'Escape': (event) => {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 },
                 'Esc': (event) => {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 }
             }
@@ -52,7 +52,7 @@
                     },
                     onSuccess: (response) => {
                         window.parent.qBittorrent.Rss.updateRssFeedList();
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                     },
                     onFailure: (response) => {
                         if (response.status === 409)
diff --git a/src/webui/www/private/newfolder.html b/src/webui/www/private/newfolder.html
index cc1259b8d..5429d2575 100644
--- a/src/webui/www/private/newfolder.html
+++ b/src/webui/www/private/newfolder.html
@@ -19,11 +19,11 @@
                     event.preventDefault();
                 },
                 'Escape': (event) => {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 },
                 'Esc': (event) => {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 }
             }
@@ -51,7 +51,7 @@
                     },
                     onSuccess: (response) => {
                         window.parent.qBittorrent.Rss.updateRssFeedList();
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                     },
                     onFailure: (response) => {
                         if (response.status === 409)
diff --git a/src/webui/www/private/newtag.html b/src/webui/www/private/newtag.html
index 16b779ce3..4e67beaf7 100644
--- a/src/webui/www/private/newtag.html
+++ b/src/webui/www/private/newtag.html
@@ -19,11 +19,11 @@
                     event.preventDefault();
                 },
                 'Escape': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 },
                 'Esc': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 }
             }
@@ -66,7 +66,7 @@
                                 tags: tagName,
                             },
                             onComplete: function() {
-                                window.parent.closeWindows();
+                                window.parent.qBittorrent.Client.closeWindows();
                             }
                         }).send();
                         break;
@@ -82,7 +82,7 @@
                                 tags: tagName,
                             },
                             onComplete: function() {
-                                window.parent.closeWindows();
+                                window.parent.qBittorrent.Client.closeWindows();
                             }
                         }).send();
                         break;
diff --git a/src/webui/www/private/rename.html b/src/webui/www/private/rename.html
index 1284812db..1775f0119 100644
--- a/src/webui/www/private/rename.html
+++ b/src/webui/www/private/rename.html
@@ -19,11 +19,11 @@
                     event.preventDefault();
                 },
                 'Escape': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 },
                 'Esc': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 }
             }
@@ -53,7 +53,7 @@
                             name: name
                         },
                         onComplete: function() {
-                            window.parent.closeWindows();
+                            window.parent.qBittorrent.Client.closeWindows();
                         }
                     }).send();
                 }
diff --git a/src/webui/www/private/rename_feed.html b/src/webui/www/private/rename_feed.html
index 141e1a01f..4698c6e47 100644
--- a/src/webui/www/private/rename_feed.html
+++ b/src/webui/www/private/rename_feed.html
@@ -19,11 +19,11 @@
                     event.preventDefault();
                 },
                 'Escape': (event) => {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 },
                 'Esc': (event) => {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 }
             }
@@ -61,7 +61,7 @@
                     },
                     onSuccess: (response) => {
                         window.parent.qBittorrent.Rss.updateRssFeedList();
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                     },
                     onFailure: (response) => {
                         if (response.status === 409) {
diff --git a/src/webui/www/private/rename_file.html b/src/webui/www/private/rename_file.html
index 49cdbada8..b9ed1e99c 100644
--- a/src/webui/www/private/rename_file.html
+++ b/src/webui/www/private/rename_file.html
@@ -20,11 +20,11 @@
                     event.preventDefault();
                 },
                 'Escape': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 },
                 'Esc': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 }
             }
@@ -70,7 +70,7 @@
                         newPath: newPath
                     },
                     onSuccess: function() {
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                     },
                     onFailure: function() {
                         alert('QBT_TR(Failed to update name)QBT_TR[CONTEXT=HttpServer]');
diff --git a/src/webui/www/private/rename_files.html b/src/webui/www/private/rename_files.html
index 01ede024c..947aa8ed7 100644
--- a/src/webui/www/private/rename_files.html
+++ b/src/webui/www/private/rename_files.html
@@ -75,11 +75,11 @@
                 defaultEventType: 'keydown',
                 events: {
                     'Escape': function(event) {
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                         event.preventDefault();
                     },
                     'Esc': function(event) {
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                         event.preventDefault();
                     }
                 }
@@ -298,7 +298,7 @@
             $('renameButton').set('value', replaceOperation);
         });
         $('closeButton').addEvent('click', function() {
-            window.parent.closeWindows();
+            window.parent.qBittorrent.Client.closeWindows();
             event.preventDefault();
         });
         // synchronize header scrolling to table body
diff --git a/src/webui/www/private/scripts/client.js b/src/webui/www/private/scripts/client.js
index ca86563b6..b02f655f1 100644
--- a/src/webui/www/private/scripts/client.js
+++ b/src/webui/www/private/scripts/client.js
@@ -1,5 +1,6 @@
 /*
  * MIT License
+ * Copyright (C) 2024  Mike Tzou (Chocobo1)
  * Copyright (c) 2008 Ishan Arora <ishan@qbittorrent.org>,
  * Christophe Dumez <chris@qbittorrent.org>
  *
@@ -24,6 +25,48 @@
 
 'use strict';
 
+if (window.qBittorrent === undefined) {
+    window.qBittorrent = {};
+}
+
+window.qBittorrent.Client = (() => {
+    const exports = () => {
+        return {
+            closeWindows: closeWindows,
+            genHash: genHash,
+            getSyncMainDataInterval: getSyncMainDataInterval,
+            qbtVersion: qbtVersion
+        };
+    };
+
+    const closeWindows = function() {
+        MochaUI.closeAll();
+    };
+
+    const genHash = function(string) {
+        // origins:
+        // https://stackoverflow.com/a/8831937
+        // https://gist.github.com/hyamamoto/fd435505d29ebfa3d9716fd2be8d42f0
+        let hash = 0;
+        for (let i = 0; i < string.length; ++i)
+            hash = ((Math.imul(hash, 31) + string.charCodeAt(i)) | 0);
+        return hash;
+    };
+
+    const getSyncMainDataInterval = function() {
+        return customSyncMainDataInterval ? customSyncMainDataInterval : serverSyncMainDataInterval;
+    };
+
+    const qbtVersion = function() {
+        return LocalPreferences.get('qbtVersion', '');
+    };
+
+    return exports();
+})();
+Object.freeze(window.qBittorrent.Client);
+
+// TODO: move global functions/variables into some namespace/scope
+
 this.torrentsTable = new window.qBittorrent.DynamicTable.TorrentsTable();
 
 let updatePropertiesPanel = function() {};
@@ -34,13 +77,6 @@ let queueing_enabled = true;
 let serverSyncMainDataInterval = 1500;
 let customSyncMainDataInterval = null;
 let useSubcategories = true;
-let searchTabInitialized = false;
-let rssTabInitialized = false;
-let logTabInitialized = false;
-
-let syncRequestInProgress = false;
-
-let clipboardEvent;
 
 /* Categories filter */
 const CATEGORIES_ALL = 1;
@@ -66,7 +102,7 @@ const TRACKERS_TRACKERLESS = 2;
 
 const trackerList = new Map();
 
-let selectedTracker = TRACKERS_ALL;
+let selectedTracker = LocalPreferences.get('selected_tracker', TRACKERS_ALL);
 let setTrackerFilter = function() {};
 
 /* All filters */
@@ -74,61 +110,6 @@ let selected_filter = LocalPreferences.get('selected_filter', 'all');
 let setFilter = function() {};
 let toggleFilterDisplay = function() {};
 
-const loadSelectedTracker = function() {
-    selectedTracker = LocalPreferences.get('selected_tracker', TRACKERS_ALL);
-};
-loadSelectedTracker();
-
-const getShowFiltersSidebar = function() {
-    // Show Filters Sidebar is enabled by default
-    const show = LocalPreferences.get('show_filters_sidebar');
-    return (show === null) || (show === 'true');
-};
-
-// getHost emulate the GUI version `QString getHost(const QString &url)`
-function getHost(url) {
-    // We want the hostname.
-    // If failed to parse the domain, original input should be returned
-
-    if (!/^(?:https?|udp):/i.test(url)) {
-        return url;
-    }
-
-    try {
-        // hack: URL can not get hostname from udp protocol
-        const parsedUrl = new URL(url.replace(/^udp:/i, 'https:'));
-        // host: "example.com:8443"
-        // hostname: "example.com"
-        const host = parsedUrl.hostname;
-        if (!host) {
-            return url;
-        }
-
-        return host;
-    }
-    catch (error) {
-        return url;
-    }
-}
-
-function genHash(string) {
-    // origins:
-    // https://stackoverflow.com/a/8831937
-    // https://gist.github.com/hyamamoto/fd435505d29ebfa3d9716fd2be8d42f0
-    let hash = 0;
-    for (let i = 0; i < string.length; ++i)
-        hash = ((Math.imul(hash, 31) + string.charCodeAt(i)) | 0);
-    return hash;
-}
-
-function getSyncMainDataInterval() {
-    return customSyncMainDataInterval ? customSyncMainDataInterval : serverSyncMainDataInterval;
-}
-
-const qbtVersion = function() {
-    return LocalPreferences.get('qbtVersion', '');
-};
-
 window.addEvent('load', function() {
     const saveColumnSizes = function() {
         const filters_width = $('Filters').getSize().x;
@@ -305,6 +286,11 @@ window.addEvent('load', function() {
         $('desktopFooterWrapper').addClass('invisible');
     }
 
+    const getShowFiltersSidebar = function() {
+        // Show Filters Sidebar is enabled by default
+        const show = LocalPreferences.get('show_filters_sidebar');
+        return (show === null) || (show === 'true');
+    };
     const showFiltersSidebar = getShowFiltersSidebar();
     if (!showFiltersSidebar) {
         $('showFiltersSidebarLink').firstChild.style.opacity = '0';
@@ -351,7 +337,7 @@ window.addEvent('load', function() {
             return true;
         }
 
-        const categoryHash = genHash(category);
+        const categoryHash = window.qBittorrent.Client.genHash(category);
         if (!category_list.has(categoryHash)) { // This should not happen
             category_list.set(categoryHash, {
                 name: category,
@@ -394,7 +380,7 @@ window.addEvent('load', function() {
         const tags = torrent['tags'].split(',');
         let added = false;
         for (let i = 0; i < tags.length; ++i) {
-            const tagHash = genHash(tags[i].trim());
+            const tagHash = window.qBittorrent.Client.genHash(tags[i].trim());
             if (!tagList.has(tagHash)) { // This should not happen
                 tagList.set(tagHash, {
                     name: tags,
@@ -573,6 +559,32 @@ window.addEvent('load', function() {
             children[i].className = (Number(children[i].id) === selectedTag) ? "selectedFilter" : "";
     };
 
+    // getHost emulate the GUI version `QString getHost(const QString &url)`
+    const getHost = function(url) {
+        // We want the hostname.
+        // If failed to parse the domain, original input should be returned
+
+        if (!/^(?:https?|udp):/i.test(url)) {
+            return url;
+        }
+
+        try {
+            // hack: URL can not get hostname from udp protocol
+            const parsedUrl = new URL(url.replace(/^udp:/i, 'https:'));
+            // host: "example.com:8443"
+            // hostname: "example.com"
+            const host = parsedUrl.hostname;
+            if (!host) {
+                return url;
+            }
+
+            return host;
+        }
+        catch (error) {
+            return url;
+        }
+    };
+
     const updateTrackerList = function() {
         const trackerFilterList = $('trackerFilterList');
         if (trackerFilterList === null)
@@ -625,7 +637,38 @@ window.addEvent('load', function() {
             child.className = (child.id === selectedTracker) ? "selectedFilter" : "";
     };
 
+    const setupCopyEventHandler = (function() {
+        let clipboardEvent;
+
+        return () => {
+            if (clipboardEvent)
+                clipboardEvent.destroy();
+
+            clipboardEvent = new ClipboardJS('.copyToClipboard', {
+                text: function(trigger) {
+                    switch (trigger.id) {
+                        case "copyName":
+                            return copyNameFN();
+                        case "copyInfohash1":
+                            return copyInfohashFN(1);
+                        case "copyInfohash2":
+                            return copyInfohashFN(2);
+                        case "copyMagnetLink":
+                            return copyMagnetLinkFN();
+                        case "copyID":
+                            return copyIdFN();
+                        case "copyComment":
+                            return copyCommentFN();
+                        default:
+                            return "";
+                    }
+                }
+            });
+        };
+    })();
+
     let syncMainDataTimer;
+    let syncRequestInProgress = false;
     const syncMainData = function() {
         const url = new URI('api/v2/sync/maindata');
         url.setData('rid', syncMainDataLastResponseId);
@@ -664,7 +707,7 @@ window.addEvent('load', function() {
                                 continue;
 
                             const responseCategory = response['categories'][key];
-                            const categoryHash = genHash(key);
+                            const categoryHash = window.qBittorrent.Client.genHash(key);
                             const category = category_list.get(categoryHash);
                             if (category !== undefined) {
                                 // only the save path can change for existing categories
@@ -682,14 +725,14 @@ window.addEvent('load', function() {
                     }
                     if (response['categories_removed']) {
                         response['categories_removed'].each(function(category) {
-                            const categoryHash = genHash(category);
+                            const categoryHash = window.qBittorrent.Client.genHash(category);
                             category_list.delete(categoryHash);
                         });
                         update_categories = true;
                     }
                     if (response['tags']) {
                         for (const tag of response['tags']) {
-                            const tagHash = genHash(tag);
+                            const tagHash = window.qBittorrent.Client.genHash(tag);
                             if (!tagList.has(tagHash)) {
                                 tagList.set(tagHash, {
                                     name: tag,
@@ -701,7 +744,7 @@ window.addEvent('load', function() {
                     }
                     if (response['tags_removed']) {
                         for (let i = 0; i < response['tags_removed'].length; ++i) {
-                            const tagHash = genHash(response['tags_removed'][i]);
+                            const tagHash = window.qBittorrent.Client.genHash(response['tags_removed'][i]);
                             tagList.delete(tagHash);
                         }
                         updateTags = true;
@@ -709,7 +752,7 @@ window.addEvent('load', function() {
                     if (response['trackers']) {
                         for (const tracker in response['trackers']) {
                             const torrents = response['trackers'][tracker];
-                            const hash = genHash(getHost(tracker));
+                            const hash = window.qBittorrent.Client.genHash(getHost(tracker));
 
                             // the reason why we need the merge here is because the web ui api returned trackers may have different url for the same tracker host.
                             // for example, some private trackers use diff urls for each torrent from the same tracker host.
@@ -739,7 +782,7 @@ window.addEvent('load', function() {
                     if (response['trackers_removed']) {
                         for (let i = 0; i < response['trackers_removed'].length; ++i) {
                             const tracker = response['trackers_removed'][i];
-                            const hash = genHash(getHost(tracker));
+                            const hash = window.qBittorrent.Client.genHash(getHost(tracker));
                             trackerList.delete(hash);
                         }
                         updateTrackers = true;
@@ -796,7 +839,7 @@ window.addEvent('load', function() {
                         torrentsTable.reselectRows(torrentsTableSelectedRows);
                 }
                 syncRequestInProgress = false;
-                syncData(getSyncMainDataInterval());
+                syncData(window.qBittorrent.Client.getSyncMainDataInterval());
             }
         });
         syncRequestInProgress = true;
@@ -827,11 +870,11 @@ window.addEvent('load', function() {
         transfer_info += " (" + window.qBittorrent.Misc.friendlyUnit(serverState.up_info_data, false) + ")";
         $("UpInfos").set('html', transfer_info);
         if (speedInTitle) {
-            document.title = "QBT_TR([D: %1, U: %2] qBittorrent %3)QBT_TR[CONTEXT=MainWindow]".replace("%1", window.qBittorrent.Misc.friendlyUnit(serverState.dl_info_speed, true)).replace("%2", window.qBittorrent.Misc.friendlyUnit(serverState.up_info_speed, true)).replace("%3", qbtVersion());
+            document.title = "QBT_TR([D: %1, U: %2] qBittorrent %3)QBT_TR[CONTEXT=MainWindow]".replace("%1", window.qBittorrent.Misc.friendlyUnit(serverState.dl_info_speed, true)).replace("%2", window.qBittorrent.Misc.friendlyUnit(serverState.up_info_speed, true)).replace("%3", window.qBittorrent.Client.qbtVersion());
             document.title += " QBT_TR(Web UI)QBT_TR[CONTEXT=OptionsDialog]";
         }
         else
-            document.title = ("qBittorrent " + qbtVersion() + " QBT_TR(Web UI)QBT_TR[CONTEXT=OptionsDialog]");
+            document.title = ("qBittorrent " + window.qBittorrent.Client.qbtVersion() + " QBT_TR(Web UI)QBT_TR[CONTEXT=OptionsDialog]");
         $('freeSpaceOnDisk').set('html', 'QBT_TR(Free space: %1)QBT_TR[CONTEXT=HttpServer]'.replace("%1", window.qBittorrent.Misc.friendlyUnit(serverState.free_space_on_disk)));
         $('DHTNodes').set('html', 'QBT_TR(DHT: %1 nodes)QBT_TR[CONTEXT=StatusBar]'.replace("%1", serverState.dht_nodes));
 
@@ -966,6 +1009,26 @@ window.addEvent('load', function() {
         MochaUI.Desktop.setDesktopSize();
     });
 
+    const registerMagnetHandler = function() {
+        if (typeof navigator.registerProtocolHandler !== 'function') {
+            if (window.location.protocol !== 'https:')
+                alert("QBT_TR(To use this feature, the WebUI needs to be accessed over HTTPS)QBT_TR[CONTEXT=MainWindow]");
+            else
+                alert("QBT_TR(Your browser does not support this feature)QBT_TR[CONTEXT=MainWindow]");
+            return;
+        }
+
+        const hashString = location.hash ? location.hash.replace(/^#/, '') : '';
+        const hashParams = new URLSearchParams(hashString);
+        hashParams.set('download', '');
+
+        const templateHashString = hashParams.toString().replace('download=', 'download=%s');
+        const templateUrl = location.origin + location.pathname
+            + location.search + '#' + templateHashString;
+
+        navigator.registerProtocolHandler('magnet', templateUrl,
+            'qBittorrent WebUI magnet handler');
+    };
     $('registerMagnetHandlerLink').addEvent('click', function(e) {
         registerMagnetHandler();
     });
@@ -1088,39 +1151,47 @@ window.addEvent('load', function() {
         MochaUI.Desktop.resizePanels();
     };
 
-    const showSearchTab = function() {
-        if (!searchTabInitialized) {
-            window.qBittorrent.Search.init();
-            searchTabInitialized = true;
-        }
+    const showSearchTab = (function() {
+        let searchTabInitialized = false;
 
-        $("searchTabColumn").removeClass("invisible");
-        customSyncMainDataInterval = 30000;
-        hideTransfersTab();
-        hideRssTab();
-        hideLogTab();
-    };
+        return () => {
+            if (!searchTabInitialized) {
+                window.qBittorrent.Search.init();
+                searchTabInitialized = true;
+            }
+
+            $("searchTabColumn").removeClass("invisible");
+            customSyncMainDataInterval = 30000;
+            hideTransfersTab();
+            hideRssTab();
+            hideLogTab();
+        };
+    })();
 
     const hideSearchTab = function() {
         $("searchTabColumn").addClass("invisible");
         MochaUI.Desktop.resizePanels();
     };
 
-    const showRssTab = function() {
-        if (!rssTabInitialized) {
-            window.qBittorrent.Rss.init();
-            rssTabInitialized = true;
-        }
-        else {
-            window.qBittorrent.Rss.load();
-        }
+    const showRssTab = (function() {
+        let rssTabInitialized = false;
 
-        $("rssTabColumn").removeClass("invisible");
-        customSyncMainDataInterval = 30000;
-        hideTransfersTab();
-        hideSearchTab();
-        hideLogTab();
-    };
+        return () => {
+            if (!rssTabInitialized) {
+                window.qBittorrent.Rss.init();
+                rssTabInitialized = true;
+            }
+            else {
+                window.qBittorrent.Rss.load();
+            }
+
+            $("rssTabColumn").removeClass("invisible");
+            customSyncMainDataInterval = 30000;
+            hideTransfersTab();
+            hideSearchTab();
+            hideLogTab();
+        };
+    })();
 
     const hideRssTab = function() {
         $("rssTabColumn").addClass("invisible");
@@ -1128,21 +1199,25 @@ window.addEvent('load', function() {
         MochaUI.Desktop.resizePanels();
     };
 
-    const showLogTab = function() {
-        if (!logTabInitialized) {
-            window.qBittorrent.Log.init();
-            logTabInitialized = true;
-        }
-        else {
-            window.qBittorrent.Log.load();
-        }
+    const showLogTab = (function() {
+        let logTabInitialized = false;
 
-        $('logTabColumn').removeClass('invisible');
-        customSyncMainDataInterval = 30000;
-        hideTransfersTab();
-        hideSearchTab();
-        hideRssTab();
-    };
+        return () => {
+            if (!logTabInitialized) {
+                window.qBittorrent.Log.init();
+                logTabInitialized = true;
+            }
+            else {
+                window.qBittorrent.Log.load();
+            }
+
+            $('logTabColumn').removeClass('invisible');
+            customSyncMainDataInterval = 30000;
+            hideTransfersTab();
+            hideSearchTab();
+            hideRssTab();
+        };
+    })();
 
     const hideLogTab = function() {
         $('logTabColumn').addClass('invisible');
@@ -1224,6 +1299,18 @@ window.addEvent('load', function() {
         });
     };
 
+    const handleDownloadParam = function() {
+        // Extract torrent URL from download param in WebUI URL hash
+        const downloadHash = "#download=";
+        if (location.hash.indexOf(downloadHash) !== 0)
+            return;
+
+        const url = decodeURIComponent(location.hash.substring(downloadHash.length));
+        // Remove the processed hash from the URL
+        history.replaceState('', document.title, (location.pathname + location.search));
+        showDownloadPage([url]);
+    };
+
     new MochaUI.Panel({
         id: 'transferList',
         title: 'Panel',
@@ -1459,6 +1546,36 @@ window.addEvent('load', function() {
     };
     registerDragAndDrop();
 
+    new Keyboard({
+        defaultEventType: 'keydown',
+        events: {
+            'ctrl+a': function(event) {
+                if (event.target.nodeName == "INPUT" || event.target.nodeName == "TEXTAREA")
+                    return;
+                if (event.target.isContentEditable)
+                    return;
+                torrentsTable.selectAll();
+                event.preventDefault();
+            },
+            'delete': function(event) {
+                if (event.target.nodeName == "INPUT" || event.target.nodeName == "TEXTAREA")
+                    return;
+                if (event.target.isContentEditable)
+                    return;
+                deleteFN();
+                event.preventDefault();
+            },
+            'shift+delete': (event) => {
+                if (event.target.nodeName == "INPUT" || event.target.nodeName == "TEXTAREA")
+                    return;
+                if (event.target.isContentEditable)
+                    return;
+                deleteFN(true);
+                event.preventDefault();
+            }
+        }
+    }).activate();
+
     // fetch qbt version and store it locally
     new Request({
         url: 'api/v2/app/version',
@@ -1491,96 +1608,3 @@ window.addEvent('load', function() {
         }
     }).send();
 });
-
-function registerMagnetHandler() {
-    if (typeof navigator.registerProtocolHandler !== 'function') {
-        if (window.location.protocol !== 'https:')
-            alert("QBT_TR(To use this feature, the WebUI needs to be accessed over HTTPS)QBT_TR[CONTEXT=MainWindow]");
-        else
-            alert("QBT_TR(Your browser does not support this feature)QBT_TR[CONTEXT=MainWindow]");
-        return;
-    }
-
-    const hashString = location.hash ? location.hash.replace(/^#/, '') : '';
-    const hashParams = new URLSearchParams(hashString);
-    hashParams.set('download', '');
-
-    const templateHashString = hashParams.toString().replace('download=', 'download=%s');
-    const templateUrl = location.origin + location.pathname
-        + location.search + '#' + templateHashString;
-
-    navigator.registerProtocolHandler('magnet', templateUrl,
-        'qBittorrent WebUI magnet handler');
-}
-
-function handleDownloadParam() {
-    // Extract torrent URL from download param in WebUI URL hash
-    const downloadHash = "#download=";
-    if (location.hash.indexOf(downloadHash) !== 0)
-        return;
-
-    const url = decodeURIComponent(location.hash.substring(downloadHash.length));
-    // Remove the processed hash from the URL
-    history.replaceState('', document.title, (location.pathname + location.search));
-    showDownloadPage([url]);
-}
-
-function closeWindows() {
-    MochaUI.closeAll();
-}
-
-function setupCopyEventHandler() {
-    if (clipboardEvent)
-        clipboardEvent.destroy();
-
-    clipboardEvent = new ClipboardJS('.copyToClipboard', {
-        text: function(trigger) {
-            switch (trigger.id) {
-                case "copyName":
-                    return copyNameFN();
-                case "copyInfohash1":
-                    return copyInfohashFN(1);
-                case "copyInfohash2":
-                    return copyInfohashFN(2);
-                case "copyMagnetLink":
-                    return copyMagnetLinkFN();
-                case "copyID":
-                    return copyIdFN();
-                case "copyComment":
-                    return copyCommentFN();
-                default:
-                    return "";
-            }
-        }
-    });
-}
-
-new Keyboard({
-    defaultEventType: 'keydown',
-    events: {
-        'ctrl+a': function(event) {
-            if (event.target.nodeName == "INPUT" || event.target.nodeName == "TEXTAREA")
-                return;
-            if (event.target.isContentEditable)
-                return;
-            torrentsTable.selectAll();
-            event.preventDefault();
-        },
-        'delete': function(event) {
-            if (event.target.nodeName == "INPUT" || event.target.nodeName == "TEXTAREA")
-                return;
-            if (event.target.isContentEditable)
-                return;
-            deleteFN();
-            event.preventDefault();
-        },
-        'shift+delete': (event) => {
-            if (event.target.nodeName == "INPUT" || event.target.nodeName == "TEXTAREA")
-                return;
-            if (event.target.isContentEditable)
-                return;
-            deleteFN(true);
-            event.preventDefault();
-        }
-    }
-}).activate();
diff --git a/src/webui/www/private/scripts/dynamicTable.js b/src/webui/www/private/scripts/dynamicTable.js
index b3f03a212..e6b1e18e8 100644
--- a/src/webui/www/private/scripts/dynamicTable.js
+++ b/src/webui/www/private/scripts/dynamicTable.js
@@ -1395,7 +1395,7 @@ window.qBittorrent.DynamicTable = (function() {
                     break; // do nothing
                 default:
                     if (!useSubcategories) {
-                        if (categoryHash !== genHash(row['full_data'].category))
+                        if (categoryHash !== window.qBittorrent.Client.genHash(row['full_data'].category))
                             return false;
                     }
                     else {
@@ -1417,7 +1417,7 @@ window.qBittorrent.DynamicTable = (function() {
                     break; // do nothing
 
                 default: {
-                    const tagHashes = row['full_data'].tags.split(', ').map(tag => genHash(tag));
+                    const tagHashes = row['full_data'].tags.split(', ').map(tag => window.qBittorrent.Client.genHash(tag));
                     if (!tagHashes.contains(tagHash))
                         return false;
                     break;
diff --git a/src/webui/www/private/scripts/prop-peers.js b/src/webui/www/private/scripts/prop-peers.js
index be5af9d91..660e6bb22 100644
--- a/src/webui/www/private/scripts/prop-peers.js
+++ b/src/webui/www/private/scripts/prop-peers.js
@@ -56,7 +56,7 @@ window.qBittorrent.PropPeers = (function() {
             syncTorrentPeersLastResponseId = 0;
             torrentPeersTable.clear();
             clearTimeout(loadTorrentPeersTimer);
-            loadTorrentPeersTimer = loadTorrentPeersData.delay(getSyncMainDataInterval());
+            loadTorrentPeersTimer = loadTorrentPeersData.delay(window.qBittorrent.Client.getSyncMainDataInterval());
             return;
         }
         const url = new URI('api/v2/sync/torrentPeers');
@@ -68,7 +68,7 @@ window.qBittorrent.PropPeers = (function() {
             method: 'get',
             onComplete: function() {
                 clearTimeout(loadTorrentPeersTimer);
-                loadTorrentPeersTimer = loadTorrentPeersData.delay(getSyncMainDataInterval());
+                loadTorrentPeersTimer = loadTorrentPeersData.delay(window.qBittorrent.Client.getSyncMainDataInterval());
             },
             onSuccess: function(response) {
                 $('error_div').set('html', '');
diff --git a/src/webui/www/private/setlocation.html b/src/webui/www/private/setlocation.html
index 36a2ee815..2f21fe7b3 100644
--- a/src/webui/www/private/setlocation.html
+++ b/src/webui/www/private/setlocation.html
@@ -19,11 +19,11 @@
                     event.preventDefault();
                 },
                 'Escape': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 },
                 'Esc': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 }
             }
@@ -55,7 +55,7 @@
                         location: location
                     },
                     onSuccess: function() {
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                     },
                     onFailure: function(xhr) {
                         $('error_div').set('text', xhr.response);
diff --git a/src/webui/www/private/shareratio.html b/src/webui/www/private/shareratio.html
index 897f0cb01..9dc804ae6 100644
--- a/src/webui/www/private/shareratio.html
+++ b/src/webui/www/private/shareratio.html
@@ -22,11 +22,11 @@
                     event.preventDefault();
                 },
                 'Escape': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 },
                 'Esc': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 }
             }
@@ -111,7 +111,7 @@
                         inactiveSeedingTimeLimit: inactiveSeedingTimeLimitValue
                     },
                     onComplete: function() {
-                        window.parent.closeWindows();
+                        window.parent.qBittorrent.Client.closeWindows();
                     }
                 }).send();
             });
diff --git a/src/webui/www/private/upload.html b/src/webui/www/private/upload.html
index b2e2b018c..e8fb925c7 100644
--- a/src/webui/www/private/upload.html
+++ b/src/webui/www/private/upload.html
@@ -164,7 +164,7 @@
 
         $('upload_frame').addEventListener("load", function() {
             if (submitted)
-                window.parent.closeWindows();
+                window.parent.qBittorrent.Client.closeWindows();
         });
 
         if ((Browser.platform === 'ios') || ((Browser.platform === 'mac') && (navigator.maxTouchPoints > 1))) {
diff --git a/src/webui/www/private/uploadlimit.html b/src/webui/www/private/uploadlimit.html
index e6cb93ef6..b0dc4d800 100644
--- a/src/webui/www/private/uploadlimit.html
+++ b/src/webui/www/private/uploadlimit.html
@@ -36,7 +36,7 @@
                         },
                         onComplete: function() {
                             window.parent.updateMainData();
-                            window.parent.closeWindows();
+                            window.parent.qBittorrent.Client.closeWindows();
                         }
                     }).send();
                 }
@@ -49,7 +49,7 @@
                             'limit': limit
                         },
                         onComplete: function() {
-                            window.parent.closeWindows();
+                            window.parent.qBittorrent.Client.closeWindows();
                         }
                     }).send();
                 }
@@ -67,11 +67,11 @@
                     event.preventDefault();
                 },
                 'Escape': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 },
                 'Esc': function(event) {
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                     event.preventDefault();
                 }
             }
diff --git a/src/webui/www/private/views/about.html b/src/webui/www/private/views/about.html
index c204b4354..c6276a0a5 100644
--- a/src/webui/www/private/views/about.html
+++ b/src/webui/www/private/views/about.html
@@ -843,7 +843,7 @@
 <script>
     'use strict';
 
-    $('qbittorrentVersion').innerText = `qBittorrent ${qbtVersion()} QBT_TR(Web UI)QBT_TR[CONTEXT=OptionsDialog]`;
+    $('qbittorrentVersion').innerText = `qBittorrent ${window.qBittorrent.Client.qbtVersion()} QBT_TR(Web UI)QBT_TR[CONTEXT=OptionsDialog]`;
     $('qtVersion').textContent = LocalPreferences.get('buildInfo.qtVersion');
     $('libtorrentVersion').textContent = LocalPreferences.get('buildInfo.libtorrentVersion');
     $('boostVersion').textContent = LocalPreferences.get('buildInfo.boostVersion');
diff --git a/src/webui/www/private/views/preferences.html b/src/webui/www/private/views/preferences.html
index 60582b5f5..6d66b49fc 100644
--- a/src/webui/www/private/views/preferences.html
+++ b/src/webui/www/private/views/preferences.html
@@ -2850,12 +2850,12 @@ Use ';' to split multiple entries. Can use wildcard '*'.)QBT_TR[CONTEXT=OptionsD
                 },
                 onFailure: function() {
                     alert("QBT_TR(Unable to save program preferences, qBittorrent is probably unreachable.)QBT_TR[CONTEXT=HttpServer]");
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                 },
                 onSuccess: function() {
                     // Close window
                     window.parent.location.reload();
-                    window.parent.closeWindows();
+                    window.parent.qBittorrent.Client.closeWindows();
                 }
             }).send();
         };