To view cache information in Firefox, enter about:cache in the address bar.
Scan your computer for malicious files and then start over from Step 1. You might find that even after you instruct Firefox to delete the cached files, they still remain. Malware can sometimes make it difficult to remove the cache in Firefox.In each instance, Firefox clears the cache if the data was created within that time frame. Choose either Last Hour, Last Two Hours, Last Four Hours, or Today. If you don't want to delete all the cache stored by Firefox, choose a different time range at Step 5.Use the Ctrl+Shift+Delete combination on the keyboard to immediately go to Step 5 above.Some older versions of Firefox have similar processes for clearing the cache, but you should keep Firefox updated to the latest version.