Firefox can't open links in new windows

[lornajane]

Describe the bug
When I press F to get hints that open in a new tab, they no longer open (from a couple of weeks ago, but the 1.67.3 release didn't fix this when it fixed other stuff). Typing f for hints and entering the hints in uppercase to get them in a new window also does nothing. Does seem to still work in Chrome though.

To Reproduce
Steps to reproduce the behavior:
0. Use Firefox with Vimium installed

1. Go to https://vimium.github.io/
2. Press F. Choose any link, this should open in a new browser tab.

Include a screenshot if applicable.

Browser and Vimium version

Firefox: 94.0
OS: Linux 5.14.18-100.fc33.x86_64 #1 SMP Fri Nov 12 17:38:44 UTC 2021
Vimium: 1.67.3

[gdh1995]

Confirmed. Sorry it's a typo bug in my code (PR #4000). I'll file a new PR to fix it.