It's doing the same thing to me as well. Ubuntu 15.10. All packages are up to date to this date
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1518863 Title: Ugly Firefox icon because of firefox.png in ~/.thunderbird Status in thunderbird package in Ubuntu: Confirmed Bug description: Description: Ubuntu 15.10 Release: 15.10 thunderbird: Installed: 1:38.3.0+build1-0ubuntu2 Candidate: 1:38.3.0+build1-0ubuntu2 Version table: *** 1:38.3.0+build1-0ubuntu2 0 500 http://archive.ubuntu.com/ubuntu/ wily/main amd64 Packages 100 /var/lib/dpkg/status Low res. Firefox icon appears in my Unity few seconds after every logon. So I search for all the firefox icons on my system, and find out that the icon comes from, ~/.thunderbird/yprpxtt3.default/extensions/{9533f794-00b4-4354-aa15-c2bbda6989f8}/chrome/skin/icons/linux/hicolor/22x22/apps/firefox.png By just renaming that I could get the default Firefox icon back. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1518863/+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