I concurr with Bushfiva..... "it's just a browser" .... and there's not really any excuse of running FF 3.6 these days !
"These days"? I moved to 3.6.18 less than six months ago. The thinking of this post highlights all that is wrong with the IT world these days. Poorly developed, bug ridden software got out to market in order to appear the latest, then constant annoying upgrades to correct the resultant issues.
Google Gears (and therefore Gmail offline) does not work on latest versions of Firefox (5 or 6 I think) and there is no intention that it will. (Google decision not Mozilla.)
And as for this... I remember when every home computer on the market had a unique OS, and once you were locked in that was it. The world moved on, and now we are in position where the three main OSs can, with some tweaking, run anything. Google however want to move back the the bad old days (for the consumer, not the manufacturer). This has already started to happen in the mobile world (Flash on i-whatever), hence my loathing of "apps" and the thinking behind them.
Sorry for the slightly OT rant
