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I installed the new update 7.0.1. When I open the program, a small box with an error message pops up: "---------->TypeError: Components.classes[cid] is undefined."

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  • 4 have this problem
  • Last reply by cor-el

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It has an OK button. When I click it the program opens. Why is this? How do I get rid of it?

I have tried deleting, downloading the update again, reinstalling it twice. This didn't help.

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

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