There is also browser.compactmode.show set to true that will allow compact density. Unfortunately that won't reduce the padding around bookmark entries. For tha

There is also browser.compactmode.show set to true that will allow compact density. Unfortunately that won't reduce the padding around bookmark entries. For that can go to https://github.com/black7375/Firefox-UI-Fix/ https://github.com/black7375/Firefox-UI-Fix/