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profile folder how do i find out what files mean

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firefox is running slow but how do i find out what is safe to delete in profile folder?

firefox is running slow but how do i find out what is safe to delete in profile folder?

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Hi Jon, this article has information on what's in the folder:

However, rather than sort through it manually, you might consider using the Refresh feature. This article describes what is kept and what is lost in that process:

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Oh, and in case this wasn't suggested during the process of submitting your question: Quick fixes if your Firefox slows down.