jel neko probo ovaj fix za bookmark size. ja to koristim odavno, nadam se da i dalje dela:
bookmark lines spacing:
create chrome folder and userChrome.css inside it in your profile folder
C/P:
/* Minimize height of sidebar items */
.sidebar-placesTreechildren::-moz-tree-row {
min-height: 18px !important;
height: 18px !important;
max-height: 18px !important;
}
In Firefox 69 and later you need to set this pref to true on the about
:config page to enable userChrome.css and userContent.css in the chrome folder.
toolkit.legacyUserProfileCustomizations.stylesheets = true
ovaj 18 promenite u sta vama odgovara
