Clearing your Browser Cache for Mozilla Firefox on Mac
Open the Mozilla Firefox application on your Mac, and select Firefox in the top-left corner of the browser window to show the dropdown menu:
Then select Settings…:
In Settings, using the pane on the left, select Privacy & Security:
Under Cookies and Site Data, select the Clear Data… button:
In the Clear Data popup window, ensure the Cookies and Site Data, and Cached Web Content options are checked:
Then select the Clear button at the bottom-right of the window:
When prompted for confirmation, select the Clear Now button:
