bmFtZQ/edge-frfox: A Firefox userChrome.css theme that aims to recreate the look and feel of the Chromium version of Microsoft Edge.
FirefoxCSS Store
Firefox 89+ – Styling the New Proton UI
How to remove the blue border around urlbar ? : FirefoxCSS
in userChrome.css
:root{ --toolbar-field-focus-border-color: transparent !important; }
Is there anyway to remove the container icon from address bar? : firefox
add to userchrome.css:
/* Remove Multi-Containers */
#pageAction-urlbar-_testpilot-containers {display: none !important}