Is that Control+C ? I'm not sure what that command is you're illustrating.
I have one of those 5 1/4 disks here somewhere as a souvenir of my first Eagle 8088, dual floppy computer. Those floppies were $50 for 10. (Used with Wordstar). I bought my first Netscape browser in the early 1990s.
This is down a rabbit hole. Now there are more browsers than you can shake a stick at.