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Why does FF use the IE Temporary Internet Files directory?

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I have used Firefox exclusively as my browser for the past 6 months. Recently, I checked my "Temporary Internet Files" folder, where IE stores visited pages, and found it full and up to date, even though I had deleted everything in it when I started using FF. Why is Firefox storing data in here? Please note: On my computer, I have set up the "Temporary Internet Files" as the IE cach folder...IT IS NOT THE FF CACHE FOLDER. Thanks for any help.

I have used Firefox exclusively as my browser for the past 6 months. Recently, I checked my "Temporary Internet Files" folder, where IE stores visited pages, and found it full and up to date, even though I had deleted everything in it when I started using FF. Why is Firefox storing data in here? Please note: On my computer, I have set up the "Temporary Internet Files" as the IE cach folder...IT IS NOT THE FF CACHE FOLDER. Thanks for any help.

Chosen solution

If you visit a website that uses MS plugins like Windows Media Player or Silverlight then those plugins will use the Windows cache (Temporary Internet Files) that IE also uses.

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How to clear the Firefox cache

Putting 'about:cache' into the navigation bar will show you some basic information about the cache.

Please see Browser.cache.disk.parent directory for more information.

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When about:cache is entered, it shows the correct path that I have set for the Firefox cache folder. This does not seem to solve the problem of the IE cache folder also being written to by Firefox.

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Sorry...forgot to include my name.

When about:cache is entered, it shows the correct path that I have set for the Firefox cache folder. This does not seem to solve the problem of the IE cache folder also being written to by Firefox.

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Chosen Solution

If you visit a website that uses MS plugins like Windows Media Player or Silverlight then those plugins will use the Windows cache (Temporary Internet Files) that IE also uses.

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Dear , How can change my firefox cache(like as parent cache ,offline cacheand etc) to any other disk drive not in firefox instalation disk(alwayes c:\)? I checked my about: config but I have not any preference name for changing the cache directory.

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d44143,

You need to add the correct preference to about:config yourself, the pref isn't in there by default.
http://kb.mozillazine.org/Browser.cache.disk.parent_directory