feat(extension): add Firefox WebExtension support

- Add a neutral WebExtension API adapter that uses Firefox browser.* or Chromium chrome.* without mutating globals.
- Switch extension runtime code to the adapter and add Firefox-specific typings for tabs, windows, tab groups, storage, scripting, and native messaging ports.
- Fix Firefox temporary add-on instructions to load the packaged manifest with background.scripts instead of the Chromium service worker manifest.
- Detect Firefox in clients.list via runtime.getBrowserInfo and keep Chromium user-agent fallback support.
- Make navigate.open wait briefly for Firefox to replace initial about:blank with the requested URL.
- Add JS coverage for API selection, clients.list browser detection, and Firefox navigate.open URL polling.
- Bump package and extension version to 0.15.2.

extension/src/commands/tabs-query.ts

@@ -1,3 +1,4 @@
+import { webExtApi as api } from '../browser-api';
 import { fetchTabHtml, getActiveTab, getAliases, isBrowserErrorUrl, tabInfo } from '../core';
 import { CommandGroup } from '../classes/CommandGroup';
 import type { CommandEntry } from '../classes/CommandGroup';
@@ -17,7 +18,7 @@ export class TabsQueryCommands extends CommandGroup {
   };
 
   private async tabsList() {
-    const windows = await chrome.windows.getAll({ populate: true });
+    const windows = await api.windows.getAll({ populate: true });
     const aliases = await getAliases();
     const tabs = [];
     for (const w of windows) {
@@ -34,7 +35,7 @@ export class TabsQueryCommands extends CommandGroup {
   }
 
   private async tabsActiveInWindow({ windowId }: TabsActiveInWindowArgs) {
-    const activeTabs = await chrome.tabs.query({ windowId, active: true });
+    const activeTabs = await api.tabs.query({ windowId, active: true });
     const tab = activeTabs[0];
     if (!tab) {
       throw new Error(`No active tab found for window ${windowId}`);
@@ -43,24 +44,24 @@ export class TabsQueryCommands extends CommandGroup {
   }
 
   private async tabsStatus({ tabId }: TabIdArgs) {
-    const tab = tabId ? await chrome.tabs.get(tabId) : await getActiveTab();
+    const tab = tabId ? await api.tabs.get(tabId) : await getActiveTab();
     return tabInfo(tab);
   }
 
   private async tabsFilter({ pattern }: TabsPatternArgs) {
-    const all = await chrome.tabs.query({});
+    const all = await api.tabs.query({});
     return all.filter(t => t.url && t.url.includes(pattern)).map(tabInfo);
   }
 
   private async tabsCount({ pattern }: TabsPatternArgs) {
-    const all = await chrome.tabs.query({});
+    const all = await api.tabs.query({});
     if (pattern) return all.filter(t => t.url && t.url.includes(pattern)).length;
     return all.length;
   }
 
   private async tabsQuery({ search }: TabsQueryArgs) {
     const q = search.toLowerCase();
-    const all = await chrome.tabs.query({});
+    const all = await api.tabs.query({});
     return all.filter(t =>
       (t.url && t.url.toLowerCase().includes(q)) ||
       (t.title && t.title.toLowerCase().includes(q))
@@ -68,7 +69,7 @@ export class TabsQueryCommands extends CommandGroup {
   }
 
   private async tabsWatchUrl({ pattern, timeout = 30000, tabId }: TabsWatchUrlArgs = {}) {
-    const tab = tabId ? await chrome.tabs.get(tabId) : await getActiveTab();
+    const tab = tabId ? await api.tabs.get(tabId) : await getActiveTab();
     const deadline = Date.now() + timeout;
     const regex = new RegExp(pattern);
     let lastUrl = tab.url || tab.pendingUrl || "";
@@ -81,7 +82,7 @@ export class TabsQueryCommands extends CommandGroup {
     if (matches(lastUrl)) return tabInfo(tab);
 
     while (Date.now() < deadline) {
-      const t = await chrome.tabs.get(tab.id);
+      const t = await api.tabs.get(tab.id);
       lastUrl = t.url || t.pendingUrl || "";
       lastStatus = t.status || "unknown";
       if (matches(t.pendingUrl || "") || matches(t.url || "")) return tabInfo(t);