looking at a one week sample of crashes for 3.0.9 I'm seeing over 1200 crashes at: 1209 coFFPlgn.dll@0x2e2f1 about 1/3 of these have the url:about blank possible indicating some relation to open new tab, but a variety of other urls are also listed. comments also indicate many users encountering crashes with this signature at shutdown. if you add in all the other possibly related crashes in this .dll at other address it would point to a general instability problem. there is also a long running thread on the norton support forum http://community.norton.com/norton/board/message?board.id=nis_feedback&thread.id=41555&view=by_date_ascending&page=1 here are the other possibly related signatures and counts of 3.0.9 crashes in the last week 359 coFFPlgn.dll@0x2db6a 313 coFFPlgn.dll@0x67e8c 66 coFFPlgn.dll@0x2a9e5 46 coFFPlgn.dll@0x8c5d 32 coFFPlgn.dll@0x29854 29 coFFPlgn.dll@0x67e8d 29 coFFPlgn.dll@0x8a4d 13 coFFPlgn.dll@0x6ad64 5 coFFPlgn.dll@0x9e3a 5 coFFPlgn.dll@0x5c6b 2 coFFPlgn.dll@0x6c42c 2 coFFPlgn.dll@0x6e10d 2 coFFPlgn.dll@0x67e94 2 coFFPlgn.dll@0x133a3 2 coFFPlgn.dll@0x59657 1 coFFPlgn.dll@0x15d7e 1 coFFPlgn.dll@0x23881 1 coFFPlgn.dll@0x2e2f3 1 coFFPlgn.dll@0x32dbb 1 coFFPlgn.dll@0x38b6e 1 coFFPlgn.dll@0x3bc90 1 coFFPlgn.dll@0x3bd86 1 coFFPlgn.dll@0x3e28f 1 coFFPlgn.dll@0x43da5 1 coFFPlgn.dll@0x43db0 1 coFFPlgn.dll@0x6ad65 1 coFFPlgn.dll@0x6b0b4 1 coFFPlgn.dll@0x8ab8 1 coFFPlgn.dll@0x8c5f 1 coFFPlgn.dll@0x2db6a 1 coFFPlgn.dll@0x2e2f3 setting this to a plugin compatibility problem until we know more.

kev, do you know if norton is tracking on this issue?

fwiw, this ranks #23, #39, #47, and #68 in the topcrash list for Firefox 3.0.10, which, combined, gives it an overall ranking of #5 (currently around 8000k reports in the last week).

One user experience this problem too. I told him to check several components and run tests with disabling them. He has version 16.5.0.135 installed. He will report back shortly.

I have found that the Norton Safety Minder Firefox extension (part of Norton Online Family) causes a crash when opening a tab in a new window (at least when the tab is dragged off of the tab bar). Disabling the add-on stops the browser from crashing. I am running Windows 7 Starter, Firefox 3.6.8 and the crash signature is coFFFw.dll@0x31171

clegnitto, have you been in contact lately. we should get norton folks looking at this. annoyingring, thanks for isolating steps to reproduce.

Looks like we cannot find this signature anymore. Likely the 3rd party issue got fixed or there is some other new signature. Crashes don't seem to appear with this dll anymore so resolving as works for me.