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FF Profile stored in two folders? AppData\Local ; AppData\Roaming ?

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Hi guys, when trying to back-up my FF Profile, I have noticed, that my Firefox created two directories for 1 profile in different location ? I see my profile folder in "AppData\Local" location and also "AppData\Roaming" location.

The latter one seems to be the corresponding profile dir (with places.sqlite) .

the former one looks weird and has over 1 GB. Can someone help me what's wrong with my FF installation (why FF did create these two folders?) Can I delete the "Local" profile dir ? (1 GB of senseless data is really bugging me)

Hi guys, when trying to back-up my FF Profile, I have noticed, that my Firefox created two directories for 1 profile in different location ? I see my profile folder in "AppData\Local" location and also "AppData\Roaming" location. The latter one seems to be the corresponding profile dir (with places.sqlite) . the former one looks weird and has over 1 GB. Can someone help me what's wrong with my FF installation (why FF did create these two folders?) Can I delete the "Local" profile dir ? (1 GB of senseless data is really bugging me)

Modified by jablka

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"AppData\Local" is the cache folder, the offline cache folder, anti-phising database, along with 2 fast load files.

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ok, and what does this mean ? is the cache helpful to increase speed when loading a frequently visited web pages? I just cleared the cache (via menu in FF), what's the purpose of clearing the cache ? sorry for this newbie question

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The main profile folder is in AppData\Roaming

The other location in AppData\Local is used for the cache and the phishing protection database.