I have custom userChrome file that made my history and hamburger menu (application menu / settings) text and distances smaller since Firefox introduced this ugly feature, trying to be cool in windows 10 times. Nowadays even windows 11 brings back compact mode but firefox still uses huge spacing. I just fixed issue with custom CSS and forgot about it. Unfortunately, '''after updating to FF 151, my CSS is ignored and I am forced to new ugly context menu'''. What is weird, '''I still have good small pacing when right-clicking pages, UI elements and when I enter bookmarks. Only places that ignore my CSS are hamburger menu for settings and list under history view'''. I do not really understand this code, I just copied it from someone else. Can someone help me fix this issue? menupopup > menu, menupopup > menuitem{ padding-block: 3px !important; min-height: 0px !important; } :root{ --arrowpanel-menuitem-padding: 0px !important; }