Hi, You can try to access Gmail without the Gmail labs feature and see if the problem goes away: https://mail.google.com/mail/?labs=0 If it works then perhaps a labs feature is problem. http://support.google.com/mail/bin/answer.py?hl=en&answer=97386 Also, try accessing after clearing the cache: '''Ctrl''' + '''Shift''' + '''Del''' or '''Tools''' ('''Alt''' + '''T''') > '''Clear Recent History''', choose '''Everything''' in '''Time range to clear''' and '''Cache''' in '''Details'''. [https://support.mozilla.org/en-US/kb/Clear%20Recent%20History?s=clear+recent+history&r=0&e=sph&as=s Clear Recent History] If all fails please also try accessing in [https://support.mozilla.com/en-US/kb/Safe%20Mode Safe Mode] [http://kb.mozillazine.org/Problematic_extensions Problematic Extensions] [https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes Troubleshooting Extensions and Themes] [https://support.mozilla.com/en-US/kb/Troubleshooting%20plugins Troubleshooting Plugins] [http://kb.mozillazine.org/Testing_plugins Testing Plugins] [http://support.mozilla.com/en-US/kb/Uninstalling+add-ons Uninstalling Add-ons] [http://kb.mozillazine.org/Uninstalling_toolbars Uninstalling Toolbars]

Thanks for your help Vivek.Wilfred - much appreciated I use Firefox in private browsing mode as standard so not sure what difference the history might makes. As to your other suggestions, again thanks. But, what tech companies just don't seem to 'get' is that the majority of users just want to use the tools 'as advertised'. I have my Gmail set up as I want it... yes with a lab turned on to translate emails. I'm not switching it off or indeed spending a day trying to unpick something that should have been checked before FF9 was released. I suspect many users hold the same opinion. Firefox guys, if your tool doesn't work with one of the largest email providers on the planet, I'm not about to spend 48 hours playing with it so that it can deliver a sub-optimal experience. I'm just going to use Chrome. Bye.