The second-most-popular Firefox add-on is another ad blocker, uBlock Origin it has more than 3.65 million users.
The specialty of the theme is that it will change each week with a top selection from NASA’s image of the day.
Abstract Causes Fashion Film and TV Firefox Foxkeh Holiday Music Nature Other Scenery Seasonal Solid Sports Websites Up & Coming Most Popular Top Rated Recently Added Categories. 2) Walnut for Firefox A different type of theme, adds a cool wooden look to the page. 1) Metal Lion - Vista A real cool theme that improves on the current buttons and style of Firefox. All the extensions can be downloaded here.