tommi/firefox-monoline: Minimize your Firefox toolbar to one single line - Codeberg.org
Simple Tab Groups – Adoptez cette extension pour 🦊 Firefox (fr)
Small tabs and fonts in my firefox | Firefox Support Forum | Mozilla Support
Supporting Compact Mode in Firefox Proton
Compact tabs - Orion Public Issue Tracker
How to Get and Use Vertical Tabs on Mozilla Firefox
Compact mode workaround in Firefox | Firefox Help
Compact Firefox window - How do i change navigation bar and tab strip on top, while permanently enabled menu bar combined with naviagion bar | Firefox Support Forum | Mozilla Support
Tip] Restore “Compact Mode” Density Option in Firefox Customize Window – AskVG
Compacting Firefox's Layout with Sidebery and User Chrome