To clear the cache in Firefox Browser, click the settings icon in the top right-hand corner of the page to access the browser’s settings.
From the drop-down list, select the Manage more settings option.
On the next page, select the General hyperlink.
Scroll down to the Network Settings section, which is at the bottom of the page and select the Settings button.
On the Connection Settings, check the Do not prompt for authentication if the password is saved to prevent Firefox from rendering bad pages.
