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How can I efficiently deduce which Add On is thwarting my Firefox tabs from loading, since 5 hours ago?

  • 3 replies
  • 1 has this problem
  • Last reply by cor-el

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6 hours ago, I shut down my Windows 10 laptop to buy lunch.

1 hour later, I turned on my laptop. But then Firefox stopped loading any tabs. My Internet — my other browsers like Chrome and Edge — have all been working perfectly. See below — Firefox in "Troubleshoot Mode" works perfectly!

Therefore, is one of my ≥ 30 Add Ons the glitch? How can I most productively suss out which Add On, without disabling each of my ≥ 30 Add Ons singly?

Attached screenshots

All Replies (3)

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The best way is to deactivate half of your add-ons, see if the issue remains, then keep repeating that process in the half where the issue happens until you narrow down which one it is.


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An add-on is not necessarily the cause of your problem.


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Note that the screenshot show you use an unstable Nightly build, so you can expect issues and best is to have another (release) version installed as a fallback in case of issues with Nightly.

If it works in Troubleshoot Mode and in normal mode with all extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) disabled then try to find which extension is causing the problem by enabling one extension at a time until the problem reappears.

Close and restart Firefox after each change via one of these just to be sure (e.g. startup cache issues):

  • "3-bar" menu button -> Exit (Power button)
  • Windows: File -> Exit
  • Mac: Firefox -> Quit Firefox
  • Linux: File -> Quit


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