Google told Chrome users earlier in the week to switch to outdated versions of Internet Explorer or Mozilla Firefox if they want to access Gmail when they are not connected to the web. On Tuesday, Google dropped offline support for Chrome, IE9, Firefox 4, Safari, and Opera. What’s the big reason? Google’s conversion to HTML5 this summer.
Google currently uses an old plug-in called Gears and the company feels it is time to keep up with technology (especially considering they are a seen as a founding father of technology). The current version of Chrome 11 is considered stable and doesn’t run Gmail in offline mode either.