[Quick Tip] Fix White Border at the top of Firefox Browser in Ubuntu Linux

This quick tutorial shows how to fix the white border (top-left corner and top-right corner) issue in Firefox web browser (without title bar) in Ubuntu Linux.

Firefox web browser can easily hide its title-bar in the ‘Customize‘ page so it looks more native in Gnome desktop. It is however has the ‘pointy white corner‘ issue at the top-left and top-right of the browser window.

To fix the problem, you can enable argb visual widget by doing following steps one by one:

  1. In Firefox, type about:config in URL bar and hit Enter.
  2. Click on the blue button which says ‘Accept the Risk and Continue‘.
  3. Next type mozilla.widget.use-argb-visuals in the filter, make sure Boolean is selected, and finally click on ‘+‘, the plus icon, to enable argb visual.

That’s it. Restart Firefox to apply changes and enjoy!

Hi, I'm Merilyn Ne, a computer geek working on Ubuntu Linux for many years and would like to write useful tips for beginners. Forgive me for language mistakes. I'm not a native speaker of English.