Creating and closing tabs too quickly can trigger the "What's wrong" error (whatsWrongMessage) where STG seemingly crashes

[nekohayo]

Describe the bug

I've been encountering this bug for years, when I open and close tabs too quickly, but I hadn't reported it until now.

To Reproduce
Steps to reproduce the behavior:

1. Press Ctrl+T to open a new tab
2. Immediately press Ctrl+W to close the tab.
   If the error does not occur, repeat steps 1 and 2 a couple of times quickly, as it might be dependent on the timing.

Result: STG's icon will change to a warning triangle symbol (⚠️) as if it had crashed, and you will get an error notification message that says, "Whats wrong...\nPlease contact with developer" ; it seems to be emitted from this part of the code:

        case 'show-error-notification':
            const isMessageSended = sendMessage('show-error-notification');

            Utils.notify(
                ['whatsWrongMessage'],
                undefined,
                'whatsWrongMessage',
                '/icons/exclamation-triangle-yellow.svg',
                () => !isMessageSended && Urls.openDebugPage()
            ).catch(() => { });

            result.ok = true;
            return result;

Expected behavior

Ideally, STG shouldn't be crashable this way :)

Desktop:

• OS and version: Fedora 41 (Linux)
• Firefox version: 136
• Simple Tab Groups version: 5.3

[nekohayo]

Alternatively, I think I've also seen this happen when I was closing tabs while Firefox was still busy re-loading the tabs on startup, if STG hadn't fully loaded... but this is just based on my memories, I am not 100% sure if that's the other way to reproduce it reliably.

[cweiske]

I nearly always get this error when switching to another tab group. This began when I upgraded to Firefox 136.0 yesterday.

This is with Simple Tab Groups 5.1.

---

Manually upgrading to 5.3.1 fixes the problem for me.