Very cool, thank you - I'll check out the hotkeys add-on!

The other extension won't work for me, mostly - for example, Bluesky doesn't give me different URLs depending on who I'm logged in as. (Which is the correct thing to do, but it does make my life slightly harder. :/)

edit: oh, nevermind. It looks like it adds a single hotkey to open a new tab in a single, specified container. I was at least hoping the hotkey would work by opening a new tab in the same container I'm in currently :/