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An unpinned pinned tab keeps returning

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Hello, I used to have Microsoft Teams as a pinned tab (in fact I think it was my first pinned tab), which I no longer need as I now have the Teams app on my computer. I have tried unpinning the Teams tab but whenever I close & reopen Firefox, it reappears - it doesn't show up initially, but will pop up 5-10 seconds after Firefox starts (my other pinned tabs show up straight away) - so I have to close it each time. Not a big issue I know but kinda annoying - any suggestions/solutions?

Hello, I used to have Microsoft Teams as a pinned tab (in fact I think it was my first pinned tab), which I no longer need as I now have the Teams app on my computer. I have tried unpinning the Teams tab but whenever I close & reopen Firefox, it reappears - it doesn't show up initially, but will pop up 5-10 seconds after Firefox starts (my other pinned tabs show up straight away) - so I have to close it each time. Not a big issue I know but kinda annoying - any suggestions/solutions?

All Replies (6)

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Are you using Sync to sync prefs as that could be a possible cause?

The browser.newtabpage.pinned pref is part of prefs than are synced like set via its Sync control pref.

  • services.sync.prefs.sync.browser.newtabpage.pinned

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No, I don't have my browser settings synced... The string you mention has "Boolean" selected, is that correct?

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Does browser.newtabpage.pinned include this website as part of the synced tabs if you check this in about:config.

All services.sync.prefs.sync.* prefs are Boolean true/false prefs and control whether to sync to include/exclude its pref in syncing prefs.

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browser.newtabpage.pinned only shows one website which isn't even in my pinned tabs? just confirming that I do not have sync turned on

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Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

  • switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click "Refresh Firefox" in the Troubleshoot Mode start window

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Sorry, I don't quite understand what you're telling me to do/check?

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