Sadly the keyboard shortcut CtrlK and CtrlQ do not work in comments:
Typing ` is a pain on German keyboards.
But since the latest Firefox version 47.0.1 (or maybe earlier) Firefox opens a search page with CtrlK. Having used it so much CtrlK is saved in muscle memory and I forget and hit it in comments ... Boom! There goes my comment. When I navigate back the comment typed so far is gone.
This is killing me. Ideally, CtrlK would work the same in comments and postings. But I would be happy to at least stop the hijacking. My search how to do it came up empty so far. Any good solutions?