I've had the same problem while loading Gmail in Debian, but I blamed it on the nightly build without checking. However, Firefox nightly builds on Windows work

I've had the same problem while loading Gmail in Debian, but I blamed it on the nightly build without checking. However, Firefox nightly builds on Windows work without a hitch. I am suspecting some firefox+linux combination messing things up. My two cents. Try in windows, might give more leads...