chore: upgrade to eslint version 10

Author: onemen

@types/addon.d.ts

@@ -566,7 +566,7 @@ declare namespace TabmixPlacesNS {
   function updateRestoringTabsList(tab: Tab): void;
   function restoreNextTab(): void;
   function addImageToLazyPendingTab(tab: Tab): void;
-  function setTabTitle(aTab: Tab, aUrl: string, title: string): void;
+  function setTabTitle(aTab: Tab, title: string): void;
   function asyncSetTabTitle(tab: Tab, options?: {url?: string; initial?: boolean; reset?: boolean; titlefrombookmark?: boolean}): Promise<boolean>;
   function asyncGetTabTitle(tab: Tab, url: string, options?: {title?: string; titlefrombookmark?: boolean}): Promise<string>;
   function getTitleFromBookmark(url: string, title?: string, titlefrombookmark?: boolean): Promise<string>;

addon/chrome/content/minit/minit.js

@@ -1786,7 +1786,7 @@ var TMP_tabDNDObserver = {
       gBrowser.isTabGroupLabel(tab) ? tabOrSplitview(tab.group.tabs[0]) : tabOrSplitview(tab);
     const oldIndex = getIndex(draggedElm);
 
-    let newIndex = -1;
+    let newIndex;
     let dropBefore = true;
     let dropOnStart = false;
     let isBetweenGroups = false;

addon/chrome/content/minit/tablib.js

@@ -221,14 +221,13 @@ Tabmix.tablib = {
 
     Tabmix.originalFunctions.gBrowser_removeTab = gBrowser.removeTab;
     gBrowser.removeTab = function (aTab, aParams = {}, ...args) {
-      let result;
       if (!aTab || aTab.hasAttribute("protected")) {
-        return result;
+        return undefined;
       }
       let lastTabInGroup = this.visibleTabs.length == 1;
       if (lastTabInGroup) {
         if (Tabmix.prefs.getBoolPref("keepLastTab")) {
-          return result;
+          return undefined;
         }
         // fix bug in TGM when closing last tab in a group with animation
         if (Tabmix.extensions.tabGroupManager) {
@@ -1162,7 +1161,7 @@ Tabmix.tablib = {
         aTab = this._selectedTab;
       }
 
-      var newTab = null;
+      var newTab;
       let copyToNewWindow = window != aTab.ownerGlobal;
       let openDuplicateNext =
         !disallowSelect && !copyToNewWindow && Tabmix.prefs.getBoolPref("openDuplicateNext");
@@ -1731,10 +1730,13 @@ Tabmix.tablib = {
       warnOnClose,
       {checkboxLabel2 = "", restoreSession = null} = {}
     ) {
-      let warningTitle = "",
-        buttonLabel = "",
-        chkBoxLabel = "",
-        warningText = "";
+      /** @type {string} */
+      let warningTitle;
+      /** @type {string} */
+      let buttonLabel;
+      /** @type {string} */
+      let chkBoxLabel;
+      let warningText = "";
       if (shouldPrompt === 1) {
         // @ts-expect-error - return types are strings
         [warningTitle, buttonLabel, chkBoxLabel] = gBrowser.tabLocalization.formatValuesSync([

addon/chrome/content/places/places.js

@@ -632,15 +632,11 @@ var TMP_Places = {
     }
   },
 
-  setTabTitle: function TMP_PC_setTabTitle(aTab, aUrl, title) {
+  setTabTitle(aTab, title) {
     if (!aTab || !aTab.parentNode) {
       return false;
     }
 
-    if (!aUrl) {
-      aUrl = aTab.linkedBrowser.currentURI.spec;
-    }
-
     if (title != aTab.label) {
       aTab.setAttribute("tabmix_changed_label", title);
       gBrowser._setTabLabel(aTab, title);
@@ -671,7 +667,7 @@ var TMP_Places = {
       return false;
     }
     if (newTitle != tab.label) {
-      this.setTabTitle(tab, url, newTitle);
+      this.setTabTitle(tab, newTitle);
       if (initial) {
         tab._labelIsInitialTitle = true;
       }

addon/chrome/content/tab/tab.js

@@ -948,7 +948,7 @@ Tabmix.tabsUtils = {
   },
 
   showNewTabButtonOnSide(aCondition, aValue) {
-    let value = null;
+    let value;
     if (this._show_newtabbutton === null) {
       value = null;
     } else if (

addon/chrome/content/tabmix.js

@@ -1091,7 +1091,7 @@ var TMP_eventListener = {
        */
       let scrollByDelta = function (delta, useInstant) {
         let instant;
-        let scrollAmount = 0;
+        let scrollAmount;
         if (isTabstrip && TabmixTabbar.isMultiRow) {
           delta = delta > 0 ? 1 : -1;
           scrollAmount = delta * tabStrip.singleRowHeight + tabStrip._distanceToRow(0);

addon/modules/ContentClick.sys.mjs

@@ -1310,8 +1310,8 @@ ContentClickInternal = {
       }
 
       if (url.match(/^http/)) {
-        let maybeFixedURI = null;
-        maybeFixedURI = fixedURI || makeURI(url);
+        /** @type {nsIURI | null} */
+        let maybeFixedURI = fixedURI || makeURI(url);
 
         // catch redirect
         const pathProp = "pathQueryRef";

addon/modules/DynamicRules.sys.mjs

@@ -365,7 +365,7 @@ export const DynamicRules = {
     }
 
     /** @type {Partial<DynamicRulesModule.TabStyle> & {[key: string]: any}} */
-    let currentPrefValues = {};
+    let currentPrefValues;
 
     /** @type {Partial<DynamicRulesModule.TabStyle> & {[key: string]: any}} */
     const prefValues = {};

addon/modules/log.sys.mjs

@@ -128,7 +128,7 @@ export const console = {
   },
 
   _getStackExcludingInternal(stack) {
-    let stackList = [];
+    let stackList;
     if (!stack) {
       stackList = Error().stack?.split("\n").slice(2) ?? [];
     } else {

package.json

@@ -28,25 +28,25 @@
   },
   "homepage": "https://github.com/onemen/TabMixPlus#readme",
   "devDependencies": {
-    "@eslint/js": "9.39.2",
-    "@stylistic/eslint-plugin": "^5.7.1",
+    "@eslint/js": "10.0.1",
+    "@stylistic/eslint-plugin": "^5.8.0",
     "@stylistic/eslint-plugin-js": "^4.4.1",
-    "@typescript/native-preview": "7.0.0-dev.20260203.1",
-    "eslint": "9.39.2",
+    "@typescript/native-preview": "7.0.0-dev.20260213.1",
+    "eslint": "10.0.0",
     "eslint-config-prettier": "^10.1.8",
-    "eslint-plugin-jsdoc": "61.5.0",
-    "eslint-plugin-jsonc": "^2.21.0",
+    "eslint-plugin-jsdoc": "62.5.4",
+    "eslint-plugin-jsonc": "^2.21.1",
     "eslint-plugin-mozilla": "^4.3.4",
     "eslint-plugin-prettier": "^5.5.5",
     "eslint-plugin-tabmix": "workspace:./config/eslint-plugin-tabmix",
-    "globals": "^16.5.0",
+    "globals": "^17.3.0",
     "husky": "^9.1.7",
     "prettier": "^3.8.1",
     "prettier-plugin-jsdoc": "^1.8.0",
     "stylelint": "^17.0.0",
     "stylelint-config-standard": "^40.0.0",
     "typescript": "^5.9.3",
-    "typescript-eslint": "^8.46.3"
+    "typescript-eslint": "^8.55.0"
   },
   "resolutions": {
     "js-yaml": ">=4.1.1"