Permission error

Hi guys I want to install Firefox developer edition and in how to install page they say copy the Firefox folder to opt but when I do that it shows this
Screenshot from 2023-11-09 21-06-00

how can I solve this or if you know a way to install Firefox developer edition, feel free to mention it

Locked Sudo files. Can not delete files with lock on even when I enter them by password (Sudo) - #4 by vgaetera