If you regularly use Google Docs, Google Calendar, or Gmail then you had better keep your browsers up to date. Google today announced that its Google Apps will no longer support older browsers starting August 1. A big reason for this is Google Apps' need for HTML 5 support.
Older browsers to have their support phased out starting this fall, include Firefox 3.5, Internet Explorer 7, Safari 3, and all of their predecessors. Google says that these browsers simply cannot support the HTML 5 needed for new Google Apps to work. For instance, the desktop notifications in Gmail and the drag-and-drop file uploading in Google Docs.
Google will continue to support up to three of the most recent browser versions on a rolling basis for Chrome, Firefox, Internet Explorer and Safari. Whenever a new version is released, support for the third-oldest version will be dropped.
[via Google Enterprise Blog]