![Firefox 53: Quantum Compositor, Compact Themes, CSS Masks, and More - Mozilla Hacks - the Web developer blog Firefox 53: Quantum Compositor, Compact Themes, CSS Masks, and More - Mozilla Hacks - the Web developer blog](https://hacks.mozilla.org/files/2017/04/overlay-cropped.png)
Firefox 53: Quantum Compositor, Compact Themes, CSS Masks, and More - Mozilla Hacks - the Web developer blog
![GitHub - nov3o/firefox-nice-dark-theme: Very compact firefox theme that makes UI more pleasing for those who like minimal interface. Works fine for Firefox 75 GitHub - nov3o/firefox-nice-dark-theme: Very compact firefox theme that makes UI more pleasing for those who like minimal interface. Works fine for Firefox 75](https://user-images.githubusercontent.com/31302079/62637777-b43ade80-b92b-11e9-8b0f-ce8e7519a3ba.png)
GitHub - nov3o/firefox-nice-dark-theme: Very compact firefox theme that makes UI more pleasing for those who like minimal interface. Works fine for Firefox 75
![Nightly 89] Tab size too large with compact theme and "Tabs below" · Issue #338 · Aris-t2/CustomCSSforFx · GitHub Nightly 89] Tab size too large with compact theme and "Tabs below" · Issue #338 · Aris-t2/CustomCSSforFx · GitHub](https://user-images.githubusercontent.com/64961250/114052191-1e88ec80-988e-11eb-90d0-9ff02e111e7b.png)
Nightly 89] Tab size too large with compact theme and "Tabs below" · Issue #338 · Aris-t2/CustomCSSforFx · GitHub
![Mozilla decides to hide Compact Mode in Firefox for new users but keep it for existing ones - gHacks Tech News Mozilla decides to hide Compact Mode in Firefox for new users but keep it for existing ones - gHacks Tech News](https://www.ghacks.net/wp-content/uploads/2021/04/firefox-show-compact-mode.png)
Mozilla decides to hide Compact Mode in Firefox for new users but keep it for existing ones - gHacks Tech News
![The new tab design is less compact and rather confusing due to missing vertical separators : r/firefox The new tab design is less compact and rather confusing due to missing vertical separators : r/firefox](https://i.redd.it/pybe2fhrpyr61.png)
The new tab design is less compact and rather confusing due to missing vertical separators : r/firefox
![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 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](https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2011-09-07-05-28-00-911af7.png)