I’ve had to temporarily disable the BetterPrivacy extension because since I upgraded to Firefox 3.0.8 I get the above error message every single time I close the browser. Upon clicking it, all the browser windows disappear but Firefox stays active for anywhere between 5 to 30 seconds in the dock before finally quitting. It’s quite irritating!
The error mentions
NS_* (stands for NeXTSTEP, what Mac OS X was built from) which leads me to believe it may be a local problem. Anyone else having this issue?