I have received "warnings" from Gmail that I may not be able to access certain Gmail functions in the Firefox browser and should choose a more modern browser. I have been diligent in upgrading Firefox but get the same messages each upgrade. I currently use Ff 9.0.1 but as of today, Gmail will only allow me to use a very basic HTML version. Is there a fix for this problem? I would prefer to not go back to using a prior version of Firefox.