Hi peace, unfortunately there is no built-in way to hide or move menu items. It is possible using a community-supported (i.e., completely unofficial) workaround, which is to use style rules in a userChrome.css file. Here is an example of the kind of style rules that can hide menu items, although this is just an example because it's not the menu you are asking about: https://www.userchrome.org/what-is-userchrome-css.html#hidemenuitem The HOW page on the site covers setting up a userChrome.css file and setting Firefox to look for it at startup. For help with the tab context menu in particular, you might find this already covered in a thread on the following subreddit and, if not, it's a great place to find people happy to write style rule code for you: https://www.reddit.com/r/FirefoxCSS/