How to Enable the new Proton Design in Firefox.
Mozilla is about to update the appearance of the Firefox browser in 2021. The UI design, which most Firefox users know as "Photon", will get a visual and feature refresh in Firefox 89.
Firefox is a popular web browser with its own rendering engine, which is very rare in the Chromium-based browser world. Since 2017, Firefox has the Quantum engine which comes with a refined user interface, codenamed "Photon". The browser doesn't include support for XUL-based add-ons any more, so all of the classic add-ons are deprecated and incompatible. Check out Must have add-ons for Firefox Quantum.
Thanks to the changes made to the engine and the UI, the browser is amazingly fast. The user interface of Firefox became more responsive and it also starts up noticeably faster. The engine renders web pages much faster than it ever did in the Gecko era.
The current version of the "Photon" user interface was released with Firefox 57. In 2021, Mozilla is about to refresh it. Reportedly, the new "Proton" UI will look modern, and will also get new features like vertical tabs and tab grouping. Both of these features already implemented in other browsers like Vivaldi and Microsoft Edge.
Mozilla has created a bug collection which allows tracking the changes in the Proton version of the UI. From the bug names it is clear that the following UI elements will be updated.
- The Firefox address bar and tabs bar.
- The main Firefox menu.
- Context Menus.
- Modal dialogs.
Here are some mockups of how the updated interface will look.
You can enable the new Proton UI in Firefox in about;config, but at the moment of this writing it doesn't do anything even in Nightly. Anyway, the procedure is as follows.
To Enable the new Proton Design in Firefox
- Open Mozilla Firefox.
about:configin the address bar and press the
- Click on Accept the Risk and Continue on the Proceed with Caution page.
browser.proton.enabledin the search box.
- Double-click on the
browser.proton.enabledparameter to set its value to
- Restart Firefox.