Created attachment 564590 [details] Sample hang report from Apple I have several reports in my Libary/Logs over the last week. Basically I am getting a hang every day that requires me to force quit the nightly build. The hang usually happens not long after I have updated my build. The only extension I have installed in this profile is Adblock Plus. I am also running the Developer version of 10.7.2, Build 11C71 which is the latest version.
If I'm reading the hang report correctly, it looks like an incipient crash. Try waiting for 30-60 seconds the next time you see one of these "hangs", to see if Apple's crashreporter shows up. I also notice that you're running 1Password. Have you set that up to interact with Firefox?
Resolving as WFM