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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."
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 Troubleshoot Firefox issues using Safe 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).
- Don't make any changes on the Safe mode start window.