I am using Ubuntu 14.04 with multiple desktop environments (unity, cinnamon and KDE). However, after I installed KDE, Firefox began to use oxygen GTK when I am using Unity or Cinnamon.

If a click with right button on Firefox, I get this:

Menu when clicked with right button. Don't know why the menu has this transparency

I realized that others windows in firefox has the same oxygen style, like "open file". Below another screenshot.

enter image description here

How can I use each environment without one interfering into another one? Is it possible?

  • May be a silly question but did you look in the themes section to see if its listed there ? If not just try clicking default and see what happens – Mark Kirby May 8 '15 at 16:56
  • I went to Appearance > Theme. It was checked "Ambience (default)". I changed to "Adwaita" (all windows style changed), than I went back to "ambience". I opened Firefox and the problem persist. In Cinnamon, the Firefox menu is also using GTK Oxygen style. – humungs May 8 '15 at 17:02
  • You could try purging it, this will remove ALL data and reinstall, so sync it and back it up first so you don't lose any important data, in a tertminal sudo apt-get purge firefox && apt-get install firefox worth a try, I am having a hard time find any information on this issue – Mark Kirby May 8 '15 at 17:16
  • I purged, deleted .mozilla directory in my home, installed again and the problem still persists. I also tried to install another cinnamon theme. Same problem. So,purged KDE and... The problem gone away. – humungs May 8 '15 at 17:33
  • OK but do you want to use kde still ? If you do reinstall it and you can just remove the oxygen-gtk part like this sudo apt-get purge gtk-oxygen* including the * I read this here if you interested ubuntuforums.org/archive/index.php/t-2074288.html the last post, this MIGHT let you have both – Mark Kirby May 8 '15 at 17:38

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