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since I up dated keep getting type error:Components.classes[cid]is underfined popping up before firefox loads I don't have problem that I can see after it loads

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

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It pops up just before FireFox loads

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This issue can be caused by an extension that isn't working properly.

Start Firefox in Troubleshoot Firefox issues using Safe Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).