Bug 40597: Implement TorSettings module

- migrated in-page settings read/write implementation from about:preferences#tor
  to the TorSettings module
- TorSettings initially loads settings from the tor daemon, and saves them to
  firefox prefs
- TorSettings notifies observers when a setting has changed; currently only
  QuickStart notification is implemented for parity with previous preference
  notify logic in about:torconnect and about:preferences#tor
- about:preferences#tor, and about:torconnect now read and write settings
  thorugh the TorSettings module
- all tor settings live in the torbrowser.settings.* preference branch
- removed unused pref modify permission for about:torconnect content page from
  AsyncPrefs.jsm

Bug 40645: Migrate Moat APIs to Moat.jsm module

browser/modules/BridgeDB.jsm

+"use strict";
+
+var EXPORTED_SYMBOLS = ["BridgeDB"];
+
+const { MoatRPC } = ChromeUtils.import("resource:///modules/Moat.jsm");
+
+var BridgeDB = {
+  _moatRPC: null,
+  _challenge: null,
+  _image: null,
+  _bridges: null,
+
+  get currentCaptchaImage() {
+    return this._image;
+  },
+
+  get currentBridges() {
+    return this._bridges;
+  },
+
+  async submitCaptchaGuess(solution) {
+    if (!this._moatRPC) {
+      this._moatRPC = new MoatRPC();
+      await this._moatRPC.init();
+    }
+
+    const response = await this._moatRPC.check(
+      "obfs4",
+      this._challenge,
+      solution,
+      false
+    );
+    this._bridges = response?.bridges;
+    return this._bridges;
+  },
+
+  async requestNewCaptchaImage() {
+    try {
+      if (!this._moatRPC) {
+        this._moatRPC = new MoatRPC();
+        await this._moatRPC.init();
+      }
+
+      const response = await this._moatRPC.fetch(["obfs4"]);
+      this._challenge = response.challenge;
+      this._image =
+        "data:image/jpeg;base64," + encodeURIComponent(response.image);
+    } catch (err) {
+      console.error("Could not request a captcha image", err);
+    }
+    return this._image;
+  },
+
+  close() {
+    this._moatRPC?.uninit();
+    this._moatRPC = null;
+    this._challenge = null;
+    this._image = null;
+    this._bridges = null;
+  },
+};

browser/modules/moz.build

@@ -121,6 +121,7 @@ EXTRA_JS_MODULES += [
     "AboutNewTab.jsm",
     "AppUpdater.jsm",
     "AsyncTabSwitcher.jsm",
+    "BridgeDB.jsm",
     "BrowserUIUtils.jsm",
     "BrowserUsageTelemetry.jsm",
     "BrowserWindowTracker.jsm",
@@ -131,6 +132,7 @@ EXTRA_JS_MODULES += [
     "FaviconLoader.jsm",
     "HomePage.jsm",
     "LaterRun.jsm",
+    'Moat.jsm',
     "NewTabPagePreloading.jsm",
     "OpenInTabsUtils.jsm",
     "PageActions.jsm",
@@ -144,6 +146,8 @@ EXTRA_JS_MODULES += [
     "SitePermissions.jsm",
     "TabsList.jsm",
     "TabUnloader.jsm",
+    "TorConnect.jsm",
+    "TorSettings.jsm",
     "TransientPrefs.jsm",
     "webrtcUI.jsm",
     "ZoomUI.jsm",

toolkit/components/tor-launcher/TorStartupService.jsm

@@ -22,6 +22,17 @@ ChromeUtils.defineModuleGetter(
   "resource://gre/modules/TorProtocolService.jsm"
 );
 
+ChromeUtils.defineModuleGetter(
+  this,
+  "TorConnect",
+  "resource:///modules/TorConnect.jsm"
+);
+ChromeUtils.defineModuleGetter(
+  this,
+  "TorSettings",
+  "resource:///modules/TorSettings.jsm"
+);
+
 /* Browser observer topis */
 const BrowserTopics = Object.freeze({
   ProfileAfterChange: "profile-after-change",
@@ -53,6 +64,9 @@ class TorStartupService {
     await TorProtocolService.init();
     TorMonitorService.init();
 
+    TorSettings.init();
+    TorConnect.init();
+
     gInited = true;
   }