Disable generic UA by default

app/src/main/java/eu/faircode/email/FragmentOptionsPrivacy.java

@@ -509,7 +509,7 @@ public class FragmentOptionsPrivacy extends FragmentBase implements SharedPrefer
         swSecure.setChecked(prefs.getBoolean("secure", false));
 
         tvGenericUserAgent.setText(WebViewEx.getUserAgent(getContext()));
-        swGenericUserAgent.setChecked(prefs.getBoolean("generic_ua", true));
+        swGenericUserAgent.setChecked(prefs.getBoolean("generic_ua", false));
         swSafeBrowsing.setChecked(prefs.getBoolean("safe_browsing", false));
         swLoadEmoji.setChecked(prefs.getBoolean("load_emoji", BuildConfig.PLAY_STORE_RELEASE));
 

app/src/main/java/eu/faircode/email/WebViewEx.java

@@ -373,7 +373,7 @@ public class WebViewEx extends WebView implements DownloadListener, View.OnLongC
     static String getUserAgent(Context context, WebView webView) {
         // https://developer.chrome.com/docs/multidevice/user-agent/#chrome-for-android
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
-        boolean generic_ua = prefs.getBoolean("generic_ua", true);
+        boolean generic_ua = prefs.getBoolean("generic_ua", false);
         if (generic_ua)
             return getGenericUserAgent(context);