According to the upstream bug (https://bugzilla.mozilla.org/show_bug.cgi?id=1601082), this was affecting firefox 71 only. Marking fixed accordingly.
** Bug watch added: Mozilla Bugzilla #1601082 https://bugzilla.mozilla.org/show_bug.cgi?id=1601082 ** Changed in: firefox Importance: Medium => Unknown ** Changed in: firefox Status: Invalid => Unknown ** Changed in: firefox Remote watch: Mozilla Bugzilla #1598995 => Mozilla Bugzilla #1601082 ** Changed in: firefox (Ubuntu) Status: Triaged => Fix Released -- 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/1855997 Title: firefox www.google.com crashes when a firefox instance is already running and MOZ_ENABLE_WAYLAND is set to 1 Status in Mozilla Firefox: Unknown Status in firefox package in Ubuntu: Fix Released Bug description: Steps to reproduce: - make sure Firefox is not running - export MOZ_ENABLE_WAYLAND=1 - firefox then in a new terminal - export MOZ_ENABLE_WAYLAND=1 - firefox www.google.com Expectation: - a new tab opens in the Firefox window, loading google Actual result: - firefox crashes This is a recent regression: it used to work fine in 70.0.1+build1-0ubuntu0.19.10.1, broke when I upgraded to 71.0+build5-0ubuntu0.19.10.1. ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: firefox 71.0+build5-0ubuntu0.19.10.1 ProcVersionSignature: Ubuntu 5.3.0-24.26-generic 5.3.10 Uname: Linux 5.3.0-24-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu8.2 Architecture: amd64 BuildID: 20191205203726 CurrentDesktop: ubuntu:GNOME Date: Wed Dec 11 09:26:41 2019 DefaultProfileExtensions: extensions.sqlite corrupt or missing DefaultProfileIncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) DefaultProfileLocales: extensions.sqlite corrupt or missing DefaultProfilePrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:722 DefaultProfileThemes: extensions.sqlite corrupt or missing EcryptfsInUse: Yes InstallationDate: Installed on 2019-06-12 (181 days ago) InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416) Profiles: Profile1 (Default) - LastVersion=None/None (Out of date) Profile0 - LastVersion=71.0/20191205203726 (In use) SourcePackage: firefox UpgradeStatus: Upgraded to eoan on 2019-10-18 (53 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1855997/+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