User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0 Build ID: 20150929102827 Steps to reproduce: Install the addon SiteDelta (http://sitedelta.schierla.de/beta.de.php). Firefox Nightly crashes upon startup. I realize this is Addon related, but since there was no addon change in the last year, but a Firefox update seems to have caused the issue, I thought someone might look into this. Actual results: Firefox crashes after 1-2 seconds from start up Expected results: Firefox should not crash.

Push log: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=19b4265d0d568d232fb3a34705f947b6db7496dc&tochange=bf2bc1aa78c0b72d9b6b13f7a8c6ae61c60a51dc Please do the following: 1. Submit the crash report. 2. Start Windows Explorer. 3. In the address bar, paste the following then press Enter: %AppData%\Mozilla\Firefox\Crash Reports\submitted 4. Note the most recent file. Copy its name, then paste it in a comment here. (In reply to culicidae from comment #0) > Steps to reproduce: > > Install the addon SiteDelta (http://sitedelta.schierla.de/beta.de.php). > Firefox Nightly crashes upon startup. Merely installing the extension wasn't enough to cause a crash. The crash occurred when the add-on checked for page updates. E10s status made no difference.

Hi there, the latest is: bp-8dd4d123-768b-45f9-91ae-54de32150930.txt but I submitted one on every crash, let me know if you need more. I can also post the settings of SiteDelta if needed. Cheers, Stefan

Thank you for the update. There's no need for additional crash reports. It looks like this will be addressed by bug 1208755: the crash signature is the same, and the cause of the regression is identified as bug 1184798, which is in the regression range at comment 1.

Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:44.0) Gecko/20100101 Firefox/44.0 20151002030204 I can no longer reproduce this after the patch in bug 1208755 landed.