Hi Majus, I think the spacing of those bookmarks toolbar folder drop-downs matches the context menus and other toolbar drop-down menus, which all have more vertical space since Firefox 89. Currently, there is no built-in way to tighten up the spacing. There is work under way to tighten up the bookmark menus that drop from the main and bookmarks toolbar. In Firefox 93 (next release), the optional Compact density setting will do that. Here's a preview from the "Developer Edition" (based on the beta test version of Firefox 93): <img src="https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2021-09-08-08-56-37-c5c640.png"> However, Firefox 93 isn't scheduled to release until early October. ''Until then...'' '''''Unofficial Community-Supported Workaround''''' Firefox users can modify the user interface of the browser using custom style rules. This involves setting up a userChrome.css file. If this is your first time, make sure to set aside 10 quiet minutes to work through it. The full instructions are in the following reply: https://support.mozilla.org/en-US/questions/1346577#answer-1435049

@jscher2000 -- Thanks for the response. I'm a patient person, so I will wait for October.