When I upgraded to latest version of Firefox this error message comes up everytime I try to open it: "Type Error:Components, classes [cid] is undefined" How can I get this taken care of, what is it?

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https://support.mozilla.com/en-US/questions/729606
https://support.mozilla.com/en-US/questions/672099
thank you

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Start Firefox in <u>[[Safe Mode]]</u> to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
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* https://support.mozilla.com/kb/Safe+Mode
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*https://support.mozilla.com/kb/Safe+Mode
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Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
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See:
* [[Troubleshooting extensions and themes]]

When I upgraded to latest version of Firefox this error message comes up everytime I try to open it: "Type Error:Components, classes [cid] is undefined" How can I get this taken care of, what is it?

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