urlbar_centered_text.css

/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/urlbar_centered_text.css made available under Mozilla Public License v. 2.0
See the above repository for updates as well as full license text. */

#urlbar:not([focused]) #urlbar-input, /* ID for Firefox 70 */
#urlbar:not([focused]) .urlbar-input{ text-align: center !important; }