I have also not noticed any performance issue when disabling it so it helps me in terms of security, and doesn't seem to cause any issues. To bring up the clear cache (and other data) dialog on any browser press Ctrl, Shift and Delete in Windows, and press Shift, Cmd and Backspace on Mac. The specific reason why I wish to disable the cache is security, I have had far too many malicious scripts coming with images and hiding in my cache causing me trouble, so if I am going to get any malicious scripts with my images or anything like that I want to be able just to restart my browser in order to clear it from memory and everything so I don't want a persistent cache. Mozilla is offering new HTTP cache for Firefox from version 27 onwards -currently in Aurora, but disabled by default you can enable this backend cache feature by switching value of preference. Without a doubt, it is a known fact that caching of web page elements such as style sheets, javascripts and images, tend to make web pages load faster while saving loads of bandwidth for those of. In Firebug, you can disable your browser cache under the menu in the Net tab. Right, so it is the disk cache that I need to disable and that is now the option for disabling the cache? Also, sorry for my ignorance, but what does 'PB' stand for? What specific reasons do you have to disable the cache?

It is best not to disable the memory cache to avoid performance issues (Firefox needs some kind of cache to work properly). Disable cache in Firefox using preferences You need to disable two entries in the Firefox preferences to stop local. The memory cache in used in normal mode and in PB mode and is purged when you close Firefox.

The disk cache is used in normal (non PB mode) and stores persistent data on the hard drive.

Disable internet cache firefox