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XUL Runner This profile was last used with a newer version of this application. Please create a new profile.

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What am I supposed to do about this new problem?

"XUL Runner This profile was last used with a newer version of this application. Please create a new profile." I did create a new profile. I have like 4 different profiles now from every time I've had to reinstall Firefox because it keeps crashing and freezing.

What am I supposed to do about this new problem? "XUL Runner This profile was last used with a newer version of this application. Please create a new profile." I did create a new profile. I have like 4 different profiles now from every time I've had to reinstall Firefox because it keeps crashing and freezing.
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Hmm, your question duplicated. Let's continue here: https://support.mozilla.org/questions/1432959