I don’t know a single shortcut, but does Ctrl-L Ctrl-C do what you want?

Well yes... Ctrl+L then Ctrl+C gets it.

Just F6 and then whatever your OS has to copy to clipboard.

I do ⌘ + L to move focus to the url bar then ⌘ + C to copy

edit: apparently others have already said this and those comments just haven't gotten to my server yet

I believe ctrl L moves the focus to the address bar and then you can just ctrl c to copy

Ctrl +L will move your cursor to the URL bar and select the address, and you can Ctrl+C from there. Should work on a Mac but may need to use cloverleaf button instead of ctrl.

I see as retro as everything that's unsupported (doesn't get new official games, hardware isn't sold) and emulateable.

I mean, yes sure SNES feels "more retro" than a PS3 for sure, but games in 8bit or bit style are still made today. And after the sprite-based consoles, there is no clear cut anymore.

I suppose you could make a cut at shader support, i.e. after PS2, but then then the OG Xbox is between worlds then and spoils the generational difference.

Someone suggested HDMI, but the first iteration of X360 didn't have that, while older consoles like GC can be more easily retrofitted.

So, either the cut-off is between sprites/16b and 3D/32b, orrr... Just the support.

Generic shortcuts - F6 and Ctrl+L both get the URL selected. Ctrl+C can copy - switch window and paste.

Alternatively, if the windows are both open you can drag the Padlock icon (certainly with Firefox) to your field.

Install Vimium C browser extension and then you press just 'y'-key twice. It means yank in vim.

You can do Ctrl+F6+C. Though the C should be after the F6.