If you hold the Shift key when you reload (e.g., Ctrl+Shift+r) then Firefox should disregard cached files and re-request everything.

Are you changing the banner URL to prevent use of a cached banner?

See also http://kb.mozillazine.org/browser.cache.check_doc_frequency (e.g. 1)

CO- RELL THIS LOOKS LIKE THE SETTING I NEED TO CHANGE BUT I DONT SEE HOW TO MAKE THE CHANGE IN FIREFOX CAN YOU GIVE ME THE DIRECTIONS PLEASE

Type about:config in the location (address) bar and press the "Enter" key to open the about:config page, just like you open a website by typing the URL in the location bar.

• If you see a warning message then you can confirm that you want to access the about:config page.

• use the Search bar at the top of the about:config page to locate preferences more easily
• preferences that have been modified and do not have the default value show as bold (user set)
• preferences that are user set (bold) can be reset to the default value via the right-click context menu
• preferences can be changed via the right-click context menu: Modify (String or Integer) or Toggle (Boolean) or by double-clicking the line with the pref
• preferences can be created via the right-click context menu: New -> String, Integer, Boolean

See also:

• http://kb.mozillazine.org/about:config

I have same issue with my site astrotarot .Mozill is apparently ignoring new version and serve me cached even if I pull directly form server with f5. Am i missing someting or it is a bug?

Reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.

• Press and hold Shift and left-click the Reload button.
• Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
• Press "Command + Shift + R" (MAC)