Changelog Legend: [+] = Added [*] = Changed [^] = Moved [=] = No Changes [x] = Deleted [!] = Bugs [_] = To Do [>] = Migrated [<] = Migrated Linux Operating System Notes: [_] Increasing watch handles on Linux [z260726wa] Adding external local disk storage to Nextcloud [_] Manually set the time zones [...]

Use about:config –> browser.uidensity . browser.uidensity is set to 0 by default.  Changer the  value to 1 and it takes immediate effect.