Hi, We appreciate your feedback on the recently redesigned Firefox browser. We set out in 2021 to reimagine Firefox's design to be fast, modern and inviting. With the latest 89 release, we’re bringing you a modern new look designed to streamline and calm things down so you have a fresh new web experience every time you use Firefox. I am not aware of any way to change the density of the bookmarks menu at present, but this may be something that we revisit in a future update.