At 1:30 am, my Firefox tab crashed while I was watching YouTube. Recovering the tab was fruitless as it continued to crash, and moments later all the tabs had crashed and couldn't be recovered. Then Firefox itself crashed, and now every time I try to run it it crashes - even if started in Safe Mode by means of Shift+Click. I was initially sure that one of the add-ons I installed yesterday were the cause. These add-ons were Auto Tab Discard, Tree Style Tab, OneTab and Tabliss (the latter two were disabled at the time of the crash). After the crash, I went into the /Extensions folder and removed all of these recently installed add-ons, but it makes no difference. Besides that, the documentation states that if the crash persists on Safe Mode the extensions can't be the issue. For completeness anyway, here are the rest of the add-ons in my extensions directory, courtesy of CMD's dir /b: bookmarkdupes@martin-vaeth.org.xpi default-bookmark-folder@gustiaux.com.xpi enhancerforyoutube@maximerf.addons.mozilla.org.xpi fbpElectroWebExt@fbpurity.com.xpi formhistory@yahoo.com.xpi https-everywhere@eff.org.xpi izer@camelcamelcamel.com.xpi jid0-raWjElI57dRa4jx9CCiYm5qZUQU@jetpack.xpi (Multiple Tab Handler) jid1-KdTtiCj6wxVAFA@jetpack.xpi (Swift Selection Search) leechblockng@proginosko.com.xpi MailtoWebmails@jetpack.xpi marcoagpinto@mail.telepac.pt.xpi (British English Dictionary) shpassword@shpassword.fr.xpi support@lastpass.com.xpi {0da2e603-21ba-4422-8049-b6d9e013ed84}.xpi (YouTube Enhancer) {5657c026-efc3-4860-b43b-16e4eaa8a9aa}.xpi (NoCoin) {66d854c2-fd1b-4857-bd0a-7d220e4834da}.xpi (WhatRuns) {a9c2ad37-e940-4892-8dce-cd73c6cbbc0c}.xpi (FeedBro) {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}.xpi (AdBlock Plus) {E0B8C461-F8FB-49b4-8373-FE32E9252800}.xpi (Evernote Web Clipper) ...as well as two more in the "staged" subfolder, YouTube AutoReplay and MultipleTab. Note that it's highly unlikely any of the remaining extensions here are the cause of the problem, as I've run these all for several months with no real problems. I really don't want to have to resort to a Firefox refresh that strips all of my add-ons and customisations, so I'd like to exhaust all options before I get there - especially since, based on similar results from the net, it doesn't even look definitive that a Refresh would actually work to do the job. It seems that the initial crash at 1:30 AM was submitted, with a Crash ID of bp-af627874-cb1c-4c73-b3f8-4c9000190127. However, there are quite a few .DMP and .EXTRA files in the \Crash Reports\pending folder, all of them between 1:30 and 1:32 AM. Thanks, I'd really appreciate some help getting Firefox up and running again as it contains my work process and I need it.