After Australis, Firefox is going to get another UI overhaul. Mozilla is working on a new UI for Firefox browser, called Photon, likely to ship with Firefox 57. Nightly user, if you’re excited about seeing upcoming UI changes to Firefox and want to test them, let me tell you Photon UI changes aren’t landing on a separate branch, Firefox team is landing them behind preferences, you can enable the preference in Firefox 55 Nightly and follow the developments.

Enable Firefox’s new Photon UI

  1. Visit about:config
  2. Find the preference browser.photon.structure.enabled and change its value to ‘true’.
  3. Restart Nightly.

Tip: You need to press Esc button on keyboard to exit custmize mode.

May 28, 2017: Latest update landed on Nightly has added ‘Bookmark This Page’, ‘Send to Device’ menu items to Page actions menu and Customize mode has been updated.

May 25, 2017: New Photon Update has added ‘sign in to Sync’ and ‘Edit , cut, copy and Paste’ menu items to hamburger menu.

May 21, 2017: Latest Photon Update has added Help menu item to the menu.

May 17: 2017: Photon Update has added Web developer sub menu to menu and now page actions menu in address bar is now  functional and got two menu items: Copy URL and email link.

May 14, 2017: More sub menu has been added to Firefox Photon Menu, which offers ‘Text Encoding’ and ‘Work Offline’ options.

May 13, 2017 : Latest update to Photon UI have been landed and Firefox team has added Library, Add-ons, Options and Customize items to the menu.

The advantage with this is everyday you see little or no UI changes or Photon updates landing on Nightly.

Update: We’ve decided to add Photon updates below as Mozilla lands the changes in Nightly:

Mozilla wants to surprise release population with Firefox 57 release, where UI looks completely different and new when compared to present Australis. FYI, Firefox team has no concerns of advanced users discovering the hidden Photon preferences before the 57 release.

Living with Photon UI 

You’ll miss the Firefox menu and options, but still they can be accessed on Windows as you can press Alt for menu bar to appear. Enable the menu bar and then you can able to open Add-ons manager (Tools > Add0ns (Ctrl+Shift+A), newly organized Firefox preferences page (Tools > options) and help menu (Help > About Nightly) for installing Nightly updates. Or, you can disable the new Photon UI and come back to the Australis UI by toggling above said preference value.

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