Anime Dark Theme Hauptmann_Vlada מאת

For Proton design new version!!
https://addons.mozilla.org/en-US/firefox/addon/animegraytheme2/


TO SWITCH BACK TO NORMAL UI DO FOLLOWING:
1. Open Firefox Nightly and type about:config in the addressbar and press Enter. It’ll show you a warning message, click on “Accept the Risk and Continue” button. It’ll open Firefox’s hidden secret advanced configuration page i.e. about:config page.

2. Now type proton in Search filter box

3. Make all the proton entries false