[jotaass]

Yeah, I'm having the same problem. It might be related to the fact that Ctrl + ] is also the keyboard shortcut to nagivate back in firefox [1], so when I try it I end up going back to the previous page. Ctrl + [ does nothing.

Or it might be that in my keyboard layout, [ and ] requires pressing RIGHT ALT + 8 and RIGHT ALT + 9, respectively.

[1] https://support.mozilla.org/en-US/kb/keyboard-shortcuts-perf...

PS: Indeed changing the layout to en-US fixes the problem, but that not a real solution.

[michaelmior]

That's odd. I wasn't aware of that shortcut. It also doesn't work for me (and my layout is already en-US AFAIK)