This brief post is for recommended extensions and themes for Gecko-based browsers (such as Floorp, Firefox, Waterfox Classic) browsers. First, as one who "needs" multiple tab rows, then unlike with minimalist Chrome, these are possible to obtain in Firefox via The Patcher (as well as Vivaldi - the best Chromium-based browser IMO), but since this takes some time, then I recommend trying Floorp, a Gecko/Firefox-based browser, originally built by two Japanese students, that has no Firefox telemetry options, and comes with the powerful tracking blocker/ad blocker uBlock Origin. And within the Settings section are a multitude of GUI customization...