I checked the boxes to remove browser history,cookies,cache and other things when the browser closes.However, for some reason Firefox doesn't delete cache completely when I close and reopen it.There is a privacy test at https://lucb1e.com/randomprojects/cookielesscookies/ that stores a tracking ETag code in cache and identifies you when you return.When I relaunch Firefox, the code is still in cache so the privacy test fails. The solution was to use an addon called "Empty Cache Button" and manually click the clear cache button. Is there any way to somehow "trigger" that addon to clear the cache automatically when the browser closes,starts or at a specific time interval ? I don't mind the performance impact of clearing the cache.Thank you. EDIT: I've tested it on 2 different profiles.