Η Mozilla will extend the beta cycle for Firefox 89 which means that we will see the release on June 1st instead of May 18th which should have been released normally.
The change in schedule was noticed by German blogger Sören Hentzschel, who reported that the delay has been implemented, so that its developers have more time Mozilla to test the new Proton UI.
With Firefox 89 in a six-week beta cycle, Firefox 90 will also have the same duration development on the Nightly branch before everything goes back to the usual four-week cycle.
Firefox 88 (the next version) will be the last version of Firefox to ship with old release cycle on April 20 and subsequent releases will be delayed two weeks from their scheduled dates.
Firefox 89 is currently in the Nightly branch. Of course as growth continues, users can download Firefox Nightly now to try out the new Proton UI. The most notable change with the new interface is that tabs will hover in the tab bar instead of appearing to be fixed in the URL bar.
It will be interesting to see how Mozilla will use the two extra weeks of beta testing.
Reddit users have already started to they complain for the Proton experience and report that they consume a lot of space but also that there are no optical separators between the tabs.