Firefox 153.0.3 on h16.0-CURRENT #105 main-n287884-16e47f317c4c: Sat Aug 1 16:20:36 PDT 2026) gmail fails to start on Firefox. No errors shown onscreen, just a completely blank . No "M" splash and the screen indicated that the load was complete afte about 1.5 seconds. (Spinner stops.) I then ran Firefox from a terminal and tried https://gmail.com, I got following messages: Extension error: [Exception... "Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIDOMWindowUtils.addSheet]" nsresult: "0x80070057 (NS_ERROR_ILLEGAL_VALUE)" location: "JS frame :: resource://gre/modules/ExtensionCommon.sys.mjs :: runSafeSyncWithoutClone :: line 66" data: no] undefined 66 [[Exception stack runSafeSyncWithoutClone@resource://gre/modules/ExtensionCommon.sys.mjs:66:12 inject@resource://gre/modules/ExtensionContent.sys.mjs:670:32 injectInto@resource://gre/modules/ExtensionContent.sys.mjs:543:19 Current stack runSafeSyncWithoutClone@resource://gre/modules/ExtensionCommon.sys.mjs:75:57 inject@resource://gre/modules/ExtensionContent.sys.mjs:670:32 injectInto@resource://gre/modules/ExtensionContent.sys.mjs:543:19 ]] One possible related issue is that, in an attempt to fix an unrelated drm problem, I ran 'pkg autoremove' which did remove a lot of ports. I have rebuilt both firefox and its dependencies. Maybe something is missing? All other Google tools (maps, calendar, etc) work fine as well as all other websites I have tried.
Gmail works for me with Firefox 153.0.4. Have you tried a fresh profile for testing to make sure it is not a preference, addon or something cached? Speaking of cached, sometimes Ctrl+Shift+r can help by reloading without relying upon the cache. I think I saw what you saw a week or so ago, but it could have been some other site (Google service or other).
While I wish I know what item broke gmail, I created a new profile and gmail works there. I really hate to lose all of my customizations, but it seems like it's time to start over. Thanks for the obvious suggestion.
You are welcome. I would also hate to lose everything too. You can examine a diff between the prefs.js files in both profiles to see if there is anything obvious. Another thing to try is "firefox --safe-mode" which will disable the extensions and themes. It could be an extension messing with your. Perhaps, a uBlock filter is doing it (been there!).