Unbreaking Firefox's address bar

I've always been annoyed that Firefox deletes the whole URL if you hit Ctrl+Backspace in the location bar. I'd like it to delete the last URL segment. It turns out that I can get this, if I go to about:config and set layout.word_select.stop_at_punctuation to true. Yay!

Sources:

• Bug 232321 - Control-backspace doesn't delete words in URL bar
• Bug 190615 - make stop_at_punctuation=true the default on unix (double-clicking shouldn't select punctuation)