Hi. You can alter context menus with userChrome.css which you have to create yourself. The group you wish to retain has more prominence where it is so I don't see what you would gain. You need to remove the blank space in the link below.

https://www.userchrome. org/what-is-userchrome-css.html

"I don't see what you would gain"

well, after my post i checked 10 desktop applications (other browsers, words, excel, office app, graphic...), none of them have the "DELETE" feature before cut/copy/past .

i was using firefox old release before to update to 115, and delete option was not in that position at all.

i don't know which release, but between 88 and 115, one update may move its position by "tiny mistake".

i aslo notice the same error is in the contexual menu of history. In older firefow release, delete/forget was in bottom position ! now, it is in up or center position in the menu ! very strange behavior or choice. I'm curious, what argument or reason have been made to justify putting "delete option" before "create/edit/cut.." ones. For me (without knowing the reason), it is an UX curious error....

i will check and learn how to use userchrome-css , thank you for your help.