Everybody knows Iceweasel is actually Firefox 3, everyboby except Google. When you visit http://gears.google.com, an ugly message says “your browser is not supported”.
The solution is easy: trivial user agent cheating
- Point your iceweasel to “about:config”.
- Find a key called “general.useragent.extra.firefox” and edit to “Firefox/3.0.5”