firefox failure to restore

[Skaperen]

i see this kind of thing happen with firefox when i shutdown the previous day with some network connected web site still connected. the TCP connection is gone. but in this case it is a local file that still exists (restarting firefox loads it ok). any idea why firefox is doing this?

http://skaperen.s3-website-us-east-1.amazonaws.com/ubuntuissues/firefox-restore-fail.png

sorry for the big image. i like to make full use of the 1920x1080 display.

[halogen2]

That means Firefox didn't quit properly. Is it crashing on quit, any related reports in about:crashes?

[Skaperen]

it got a SIGTERM. I have also tried SIGQUIT, SIGUSR1, SIGUSR2, and SIGHUP. they all do this. it seems the only way to make firefox quit gracefully is via its GUI interface. is that intended? i can undestand such an intention for SIGTERM but they should have at least some signal do a graceful quit. i suggest it be SIGHUP.