• a PC, click the "Firefox" menu in the top left corner. Next, select the right arrow next to "History >", and click "Clear Recent History" 1. press Ctrl+Shift+Delete to open the recent history window.
• On a Mac, from the Tools menu, select "Clear Recent History…" 1. Alternately, you can press Shift-Command-Delete.
2.
Make sure "Details" is expanded, then select "Cache" from the list. Uncheck everything else.
3
In the "Time Range to Clear" drop down, select "Everything"..
4
Select "Clear Now". Uncheck all other options to avoid deleting br Your computer will work for a moment, and the process will be complete. You've successfully cleared Firefox's Cache!