Rated 5 out of 5 stars

CAZWICK: Thankyou! thankyou! thankyou!
Used your fix and manager now working. A nice easy solution for someone like me who is computer useless. (I tried the earlier suggestions regarding the zipping of the xpi file, but my PC (Vista) wouldn't let me do this.
Blehhh. Thank you Mr Gates.

This is a brilliant app for Gmail and I have used it for a long time, and apart from the occasional bleep when it breaks, it has run faultlessly
The author has done a fantastic job on this app, and deserves a lot of credit - it's not his fault if Firefox is constantly shifting.