For deleting the browser cache with a shortcut in Firefox please follow these steps:

1. Press the keys [Shift], [Ctrl] and [Delete].

2. A new window opens called "Clear browsing data and cookies."

3. Submit your selections by clicking the Clear button. 

4. Refresh your site.

For deleting the browser cache with a shortcut in Firefox please follow these steps:

1. Press the keys [Shift], [Command] and [Delete].

2. A new window opens called "Clear browsing data and cookies."

3. Submit your selections by clicking the Clear button.

4. Refresh your site.