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

Chromium: Joplin Web Clipper, Zotero Connector, floccus bookmarks sync, uBlock Origin, Quick Javascript Switcher, SingleFile, uMatrix Firefox: SingleFile, Copy PlainText, floccus bookmarks sync, Joplin Web Clipper, Passman, Search by Image, Tree Style Tab, uMatrix, Undo Close Tab, Web Archives

Open the Thunderbird program folder (e.g. C:\Program Files (x86)\Thunderbird) create a new folder named distribution Create a file named policies.json with the following content:   { “policies”: { “DisableAppUpdate”: true } } Thanks to sifferedd.

Some useful aliases that are not always preconfigured on every Linux version: alias ll=’ls -alF’ alias la=’ls -A’ alias l=’ls –CF’ To eliminate the DRM warning in Firefox and Librewolf without enable DRM, add this to “userChrome.css”: notification[value="drmContentDisabled"]{ display:none !important; } toolkit.legacyUserProfileCustomizations.stylesheets must be set to true in about config.

Revisions: 21 January 2024, first publication The Thunderbird developers are moving to a new user interface code base for Thunderbird 115 and Thunderbird 102 is the last version that will work with the historical userChrome.css customizations. The userbase for Mozilla products has continually shrunk over the past few years and the chances of equivalent customization [...]