Hi, I’m sorry that it broke on your end. Please, send me an e-mail (https://addons.vaultpit.io/firefox/addon/tabcenter-reborn/ → More information (section on the left) → Add-on links → Support e-mail) or open an issue at https://framagit.org/ariasuni/tabcenter-reborn/-/issues so that I can fix this as soon as possible.