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diff --git a/toolkit/modules/ResetProfile.sys.mjs b/toolkit/modules/ResetProfile.sys.mjs
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { AppConstants } from "resource://gre/modules/AppConstants.sys.mjs";
+import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
+
+const lazy = {};
+
+XPCOMUtils.defineLazyGetter(lazy, "MigrationUtils", () => {
+ // MigrationUtils is currently only available in browser builds.
+ if (AppConstants.MOZ_BUILD_APP != "browser") {
+ return undefined;
+ }
+
+ try {
+ let { MigrationUtils } = ChromeUtils.importESModule(
+ "resource:///modules/MigrationUtils.sys.mjs"
+ );
+ return MigrationUtils;
+ } catch (e) {
+ console.error(`Unable to load MigrationUtils.sys.mjs: ${e}`);
+ }
+ return undefined;
+});
+
+const MOZ_APP_NAME = AppConstants.MOZ_APP_NAME;
+
+export var ResetProfile = {
+ /**
+ * Check if reset is supported for the currently running profile.
+ *
+ * @return boolean whether reset is supported.
+ */
+ resetSupported() {
+ if (Services.policies && !Services.policies.isAllowed("profileRefresh")) {
+ return false;
+ }
+
+ // Reset is only supported if the self-migrator used for reset exists.
+ if (
+ !lazy.MigrationUtils ||
+ !lazy.MigrationUtils.migratorExists(MOZ_APP_NAME)
+ ) {
+ return false;
+ }
+
+ // We also need to be using a profile the profile manager knows about.
+ let profileService = Cc[
+ "@mozilla.org/toolkit/profile-service;1"
+ ].getService(Ci.nsIToolkitProfileService);
+ let currentProfileDir = Services.dirsvc.get("ProfD", Ci.nsIFile);
+ for (let profile of profileService.profiles) {
+ if (profile.rootDir && profile.rootDir.equals(currentProfileDir)) {
+ return true;
+ }
+ }
+ return false;
+ },
+
+ /**
+ * Ask the user if they wish to restart the application to reset the profile.
+ */
+ async openConfirmationDialog(window) {
+ let win = window;
+ // If we are, for instance, on an about page, get the chrome window to
+ // access its gDialogBox.
+ if (win.docShell.chromeEventHandler) {
+ win = win.browsingContext?.topChromeWindow;
+ }
+
+ let params = {
+ learnMore: false,
+ reset: false,
+ };
+
+ if (win.gDialogBox) {
+ await win.gDialogBox.open(
+ "chrome://global/content/resetProfile.xhtml",
+ params
+ );
+ } else {
+ win.openDialog(
+ "chrome://global/content/resetProfile.xhtml",
+ null,
+ "modal,centerscreen,titlebar",
+ params
+ );
+ }
+
+ if (params.learnMore) {
+ win.openTrustedLinkIn(
+ "https://support.mozilla.org/kb/refresh-firefox-reset-add-ons-and-settings",
+ "tab"
+ );
+ return;
+ }
+
+ if (!params.reset) {
+ return;
+ }
+
+ // Set the reset profile environment variable.
+ Services.env.set("MOZ_RESET_PROFILE_RESTART", "1");
+
+ Services.startup.quit(
+ Ci.nsIAppStartup.eForceQuit | Ci.nsIAppStartup.eRestart
+ );
+ },
+};