fix(sync): Only send fxaStatus if UA is likely Fx, update unsupported context list

Because:
* We have some Sentry events showing users not using Firefox but with valid Sync query params. We should not send fxaStatus in this case. Other events show some users on fx_ios_v1 context, which is unsupported

This commit:
* Moves the existing isProbablyFirefox check into a helper to reference also in the useFxaStatus hook
* Adds fx_ios_v1 to unsupported contexts

closes FXA-12760

packages/fxa-settings/src/components/App/index.tsx

@@ -30,6 +30,7 @@ import {
   useIntegration,
   useLocalSignedInQueryState,
   useSession,
+  isProbablyFirefox,
 } from '../../models';
 import {
   initializeSettingsContext,
@@ -216,12 +217,8 @@ export const App = ({
       // Request and update account data/state to match the browser state.
       // If there is a user actively signed into the browser,
       // we should try to use that user's account when possible.
-      const ua = navigator.userAgent.toLowerCase();
-      // This may not catch all Firefox browsers notably iOS devices, see FXA-11520 for alternate approach
-      const isProbablyFirefox = ua.includes('firefox') || ua.includes('fxios');
-
       let userFromBrowser;
-      if (isProbablyFirefox) {
+      if (isProbablyFirefox()) {
         userFromBrowser = await firefox.requestSignedInUser(
           integration.data.context || '',
           // TODO with React pairing flow, update this if pairing flow

packages/fxa-settings/src/lib/hooks/useFxAStatus/index.test.tsx

@@ -6,7 +6,7 @@ import { renderHook } from '@testing-library/react-hooks';
 import { useFxAStatus } from '.';
 import { Constants } from '../../constants';
 import firefox from '../../channels/firefox';
-import { IntegrationType } from '../../../models';
+import { IntegrationType, isProbablyFirefox } from '../../../models';
 
 jest.mock('../../channels/firefox', () => ({
   __esModule: true,
@@ -15,9 +15,18 @@ jest.mock('../../channels/firefox', () => ({
   },
 }));
 
+jest.mock('../../../models', () => {
+  const actual = jest.requireActual('../../../models');
+  return {
+    ...actual,
+    isProbablyFirefox: jest.fn(() => true),
+  };
+});
+
 describe('useFxAStatus', () => {
   beforeEach(() => {
-    jest.resetAllMocks();
+    jest.clearAllMocks();
+    (isProbablyFirefox as jest.Mock).mockImplementation(() => true);
   });
 
   describe('SyncDesktopV3 integration', () => {
@@ -149,4 +158,19 @@ describe('useFxAStatus', () => {
       expect(firefox.fxaStatus).not.toHaveBeenCalled();
     });
   });
+
+  describe('Non-Firefox browser', () => {
+    it('does not call fxaStatus when isProbablyFirefox returns false', () => {
+      (isProbablyFirefox as jest.Mock).mockReturnValueOnce(false);
+
+      const integration = {
+        type: IntegrationType.SyncDesktopV3,
+        isSync: () => true,
+        isFirefoxNonSync: () => false,
+      };
+
+      renderHook(() => useFxAStatus(integration));
+      expect(firefox.fxaStatus).not.toHaveBeenCalled();
+    });
+  });
 });

packages/fxa-settings/src/lib/hooks/useFxAStatus/index.tsx

@@ -8,6 +8,7 @@ import {
   isOAuthIntegration,
   isSyncDesktopV3Integration,
   isOAuthNativeIntegration,
+  isProbablyFirefox,
 } from '../../../models';
 import {
   defaultDesktopV3SyncEngineConfigs,
@@ -45,7 +46,7 @@ export function useFxAStatus(integration: FxAStatusIntegration) {
   useEffect(() => {
     // This sends a web channel message to the browser to prompt a response
     // that we listen for.
-    if (isSync || isOAuthNative) {
+    if ((isSync || isOAuthNative) && isProbablyFirefox()) {
       (async () => {
         const status = await firefox.fxaStatus({
           // TODO: Improve getting 'context', probably set this on the integration

packages/fxa-settings/src/models/integrations/index.ts

@@ -14,3 +14,4 @@ export * from './sync-desktop-v3-integration';
 export * from './web-integration';
 export * from './third-party-auth-callback-integration';
 export * from './relier-interfaces';
+export * from './utils';

packages/fxa-settings/src/models/integrations/utils.ts

@@ -12,6 +12,7 @@ export function isFirefoxService(service?: string) {
 }
 
 const NO_LONGER_SUPPORTED_CONTEXTS = new Set([
+  'fx_ios_v1',
   'fx_desktop_v1',
   'fx_desktop_v2',
   'fx_firstrun_v2',
@@ -20,3 +21,13 @@ const NO_LONGER_SUPPORTED_CONTEXTS = new Set([
 export function isUnsupportedContext(context?: string): boolean {
   return !!context && NO_LONGER_SUPPORTED_CONTEXTS.has(context);
 }
+
+/**
+ * Checks if the browser is probably Firefox based on the user agent string.
+ * This may not catch all Firefox browsers, notably iOS devices.
+ * See FXA-11520 for alternate approach.
+ */
+export function isProbablyFirefox(): boolean {
+  const ua = navigator.userAgent.toLowerCase();
+  return ua.includes('firefox') || ua.includes('fxios');
+}