hello, you can choose the colour with one of the various themes that are available: https://addons.mozilla.org/firefox/themes/

You can also look at the Classic Theme Restorer extension to restore some functionality that was lost with the arrival of the Australis style in Firefox 29. *Classic Theme Restorer: https://addons.mozilla.org/firefox/addon/classicthemerestorer/ ---- See also: *https://support.mozilla.org/kb/common-questions-after-updating-to-new-firefox *https://support.mozilla.org/kb/learn-more-about-the-design-of-new-firefox *https://support.mozilla.org/kb/how-to-make-new-firefox-look-like-old-firefox

Most of the add-ons for themes are not compatible with Firefox 29. So I looked at Classic theme restorer. Seems OK. at least on the smaller screens the tabs are not lost in the background.