typeError: components.calss[cid] is undefined
typeError: components.calss[cid] is undefined
windows7 x64
typeError: components.calss[cid] is undefined
windows7 x64
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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 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.
- https://support.mozilla.com/kb/Safe+Mode