I reported the bug on Bugzilla this morning before find out it was posted here.
You can see 2 short clips of what are the effects in the post : https://bugzilla.mozilla.org/show_bug.cgi?id=1423568 ** Bug watch added: Mozilla Bugzilla #1423568 https://bugzilla.mozilla.org/show_bug.cgi?id=1423568 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1719209 Title: firefox opens nautilus inside XCFE desktop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1719209/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs