Can you open "about:crashes" in a new tab, and check whether there are reports corresponding to the timestamps when you experienced the problem? Have they been submitted?
Did the problem start happening just after installing a firefox update? (i.e. were you using an older version before yesterday?) ** Changed in: firefox (Ubuntu) Status: New => Incomplete -- 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/1870161 Title: Tabs in Firefox 74.0 crash on some websites: [GFX1-]: DrawTargetCairo::Snapshot with bad surface Status in firefox package in Ubuntu: Incomplete Bug description: Ubuntu: 19.10 Firefox: 74.0+build3-0ubuntu0.19.10.1 Since 2020.03.31 tabs in Firefox started to crash regularly on some websites (mainly Vbulletin and phpBB forums). This happens also in --safe-mode. stderr output (just this one line): [GFX1-]: DrawTargetCairo::Snapshot with bad surface 0x7efdd6d99b00, context 0x7efdd5cba000, status 0 When trying to reload tabs they keep crashing, but after like 10-20 retries they display properly and continue to work fine. Example of a website that regularly crashes Firefox: https://aryion.com/forum/ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1870161/+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