#keyd (https://github.com/rvaiya/keyd) was basically one of the biggest missing pieces for me last time I tried Linux. With it, I can map all my keys and replace application shortcuts with better defaults. Like this:
[google-chrome]
meta.[ = C-S-tab
meta.] = macro(C-tab)
[firefox-esr]
meta.] = macro(C-tab)
meta.[ = C-S-tab
That shortcut is way nicer for my hands, and I unified it everywhere. Luckily, #Ghostty has a config for this.