Firefox 47 worked around this by disabling the dark theme entirely. Firefox 55 beta supports two new independent about:config settings, widget.chrome.allow-gtk-dark-theme and widget.content.allow-gtk-dark- theme (https://bugzilla.mozilla.org/show_bug.cgi?id=1158076). The former gets you a dark-themed UI without messing up web page content.
Official PPA for Firefox beta, if you don’t want to wait: https://launchpad.net/~mozillateam/+archive/ubuntu/firefox-next ** Bug watch added: Mozilla Bugzilla #1158076 https://bugzilla.mozilla.org/show_bug.cgi?id=1158076 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/220263 Title: Bad Firefox integration with dark themes To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/220263/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs