Hello,
Since a couple of week, I’m can’t cut paste anymore with the script editor on Firefox.
I’m using firefox on linux, the “cut” command seem to act like “copy”. (content saved to clipboard without been deleted)
And the paste command act in weird way :
Clipboard content seem to be altered. The last “}” is part of the paste result
Sometime, with longer text some line the middle of the clipboard are missing :
I just gave a try in Firefox and it seems to work (v117.0.1). On what Firefox version are you? I don’t have a Linux installed machine here though, so it may not be straightforward to test your setup.