
If you see a theme you like, click the Add to Firefox button to install it. You can also use the search bar to look for a specific theme. Scroll through the page until you find the Featured Themes section and click See all to browse through the themes. In the Add-ons Manager tab, select the Get Add-ons panel. Click the menu button and choose Add-ons. The only caution to adhere with is that the theme is meant to be used in conjunction with the Arc GTK theme, don’t use it with other GTK themes or it will look broken. Please note that Arc Firefox Theme is compatible with Firefox 40+ and Firefox 38 ESR.
The theme is available as a collection on.
Click on the link below to download and install the theme. Arc Firefox theme is a flat theme with transparent elements for Ubuntu Desktop.