I keep having windows like this pop up, fairly randomly, since I updated to Firefox 17, on Windows 7.
It happens randomly with between 1 to 4 popups at once, though I can cause it to happen manually by reloading Facebook or gmail (interestingly, this behavior doesn't happen with Google reader or Google plus).
I'd like to do two things here. Firstly, have some way of actually telling what's causing this rather than try reloading tabs at random. Secondly, stop this from happening, either by fixing the issue or by suppressing these messages.
So how do I track down and eliminate this issue?
EDIT: I've installed the extension list dumper addon, to get a list of extensions that are installed.
Application: Firefox 17.0 (20121119183901) Operating System: WINNT (x86-msvc)
- Adblock Plus 2.2
- App Button Color 1.0
- AutoProxy 0.4b2.2011041023
- British English Dictionary 1.19.1
- Extension List Dumper 1.15.2
- Greasemonkey 1.5
- Mozilla Labs: Prospector - OneLiner 2
- Social Fixer 6.603
- UI Fixer 1.4.4