In the latest Firefox version(116.0.2 (64-bit)) the button “List all tabs” won’t show any tabs unless I close like half of them, then it works again if I open new random tabs. Currently 246 open tabs.

Any other way to fix this? I don’t really wanna close those tabs.

The way I know this is that I tested in a sandbox with the same profile to try to find the problem.

EDIT 14/Aug/2023: So I just found out the issue was some tabs that had a " --" at the end of the title probably caused by some addon made this issue happen. It probably isn’t really a - but I don’t know what character is that.

All you have to do is just copy the url, open a new tab, paste the url and go. Close the previous tab with " --" at the end.
Just make sure you are not opening a new tab with CTRL+(clicking the + icon) from the “broken” tab with the " --".

Example.

Hope this helps someone else.

  • jscher2000
    2•1 year ago

    I don’t know whether any errors would be recorded when Firefox tries and fails to generate the list. While viewing that window, you could open the Browser Console popup window (Ctrl+Shift+J), then click the List All Tabs button in the main window and see whether any error messages appear in the Browser Console in response.

    • ChapoOP
      2•1 year ago

      Although i managed to fix the problem, I went back to test it and indeed it gave an error:

      TypeError: lazy.ContextualIdentityService.getPublicIdentityFromId(…) is undefined3 TabsList.sys.mjs:323:40
      _createRow resource:///modules/TabsList.sys.mjs:323
      _populate resource:///modules/TabsList.sys.mjs:110
      _populate resource:///modules/TabsList.sys.mjs:275
      handleEvent resource:///modules/TabsList.sys.mjs:254
      dispatchCustomEvent resource:///modules/PanelMultiView.sys.mjs:189
      dispatchCustomEvent resource:///modules/PanelMultiView.sys.mjs:1484
      _blockersPromise resource:///modules/PanelMultiView.sys.mjs:223

      The fix is in the edit above.

      • jscher2000
        1•1 year ago

        I wasn’t able to replicate the error by adding one or two m or n dashes to the document title. Based on this error message and the screenshot, and comparing how Firefox displays other tab titles when Multi-Account Containers is installed, I wonder if the problem tab was open in a container that had been deleted or had become corrupted in some manner so Firefox had retained the assigned container ID, but that container ID no longer matched any container. Opening the URL in a new tab most likely used a different container, working around the problem.

    • ChapoOP
      1•1 year ago

      I also can’t reproduce with a new profile.

      I literary copied my profile from %appdata% and pasted it in Windows Sandbox %appdata% for testing.

      First i removed the chrome folder, could be the userChrome.css, nothing.
      Second i removed all the extensions but the problem persisted, then i started closing tabs and at around 147 tabs closed it fixes it.
      It crossed my mind it could be some extension that did something to a particular tab or something that breaks the list but it doesn’t seem coming from a specific tab.

      This only started a couple of days ago, probably when Firefox updated, not sure.
      It also messed up a bit the userChrome.css where i had custom separators a bit where i fixed with the line “padding-block: 0px !important;”.

        • ChapoOP
          1•1 year ago

          I actually just fixed it, the problem came from tabs with a " --" at the end of the title, probably added from some addon. Please check the edit above for more info.

            • dannycolin
              1•1 year ago

              I tried to reproduce it (directly from a local build) with no luck. Any chance you can share your list of addons and userChrome.css?

  • jscher2000
    1•1 year ago

    Another option would be to run a little snippet of script in the Web Console (Ctrl+Shift+K, or on Mac, it’s Command+Alt+K) to chop off the last character of the title:

    document.title = document.title.slice(0, document.title.length-1);

    If there is still something strange on there, press the up arrow and submit it again (or if there’s a Run button, click Run again).