Change Firefox Cache Location
Digital Media Minute did a post a while ago about the location of the Firefox cache.
To change Firefox cache location, add the “browser.cache.disk.parent_directory” preference (by editing your configuration) and enter a folder path. When you specify this preference, a new directory, “Cache” will be created at the path you have set.
These other two preferences must set as follows (edit configuration):
Set “browser.cache.disk.enable” to ‘true’ to store cache on the hard drive. (The default is true.)
Set “browser.cache.disk.capacity” to a positive integer equal to the max hard drive space in KB to use for cache. (Firefox default is 50000 KB)
Also, for Windows, the path separator must be 2 backslashes (for example “C:\\Path\\To\\Parent”), if the “browser.cache.disk.parent_directory” value is set in prefs.js or user.js file rather than about:config.
