The latest version of this superb theme can be downloaded from Softpedia
Oxygen KDE, a Firefox theme that tries to provide a consistent and coherent integration with the KDE desktop environment, is now at version 4.0 Beta 2.Highlights of Oxygen KDE Firefox Theme 4.0 Beta 2:
• All XUL widgets are styled using only CSS, with no images at all;
• The color scheme detection is done automatically;
• Over 20 languages are supported by the theme;
• Firefox 18.x, 19.x, 20.x are now supported;
• Various minor fixes were implemented.
The developers also took the time to explain how exactly users can install this theme. For more details about this beautiful theme, you can check out the official changelog.
Download Oxygen KDE Firefox Theme 4.0 Beta 2 right now from Softpedia. Remember that this is a beta version and it should NOT be installed on production machines. It is intended for testing purposes only.