I'm seeing similar crashes (SIGSEGV in nsIContent::SetAttr) with firefox and firefox-globalmenu 15.0.1+build1-0ubuntu0.12.04.1 (current Precise versions). When the crashing starts it happens pretty much every time I open Firefox with the Global Menu extension enabled.
Here's what gdb says (which seem to state problem rather clearly): Program received signal SIGSEGV, Segmentation fault. nsIContent::SetAttr (this=0x0, aNameSpaceID=0, aName=0x7fffdcab70c0, aValue=..., aNotify=false) at ../../../dist/include/nsIContent.h:347 347 ../../../dist/include/nsIContent.h: No such file or directory. Full backtrace attached. ** Attachment added: "firefox-backtrace" https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1051152/+attachment/3316029/+files/firefox-backtrace -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1051152 Title: Firefox 16 beta crash in nsIContent::SetAttr Status in Unity global menubar extension for Firefox and Thunderbird: Invalid Status in “firefox” package in Ubuntu: Triaged Status in “firefox” source package in Natty: Triaged Status in “firefox” source package in Oneiric: Triaged Status in “firefox” source package in Precise: Triaged Status in “firefox” source package in Quantal: Triaged Bug description: When Global Menu Bar Integration 3.4.1 is enabled, Firefox 16b3 from the firefox-next PPA crashes shortly after opening. There is a 1:1 correlation between the crashes and this add-on - the open tabs and other add-ons don't have any impact. I'm experiencing this under 64-bit Ubuntu 12.04. To manage notifications about this bug go to: https://bugs.launchpad.net/globalmenu-extension/+bug/1051152/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp