Firefox Fennec had a great tabbed interface on tablets. When Fenix came, we regressed to a stretched out phone UI. After years of stagnation, Android tablets are rising again, thanks to foldables and new initiatives from Google. Firefox is missing out by not including a tabbed interface for Android tablet users, particularly because FF has best in class syncing abilities. Android power users are enthusiastic recommenders of their favorite browsers, so it would be huge advantage over Chromium based competitors!