Hi Hanz, there is no more built-in setting to change the spacing of menu items. We are looking forward to something in a future update which will tighten up menu spacing when you turn on the optional Compact mode. We don't yet know when that will arrive (maybe in Firefox 92?). 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