Nope. It truly doesn't.
You dislike chrome and chromium because of a very specific set of behaviors when editing text in the browser that most users couldn't care less about.
I love Chrome because it integrates so well with google services and syncs automatically with my android tablet and phone, which most users either couldn't care less about, or choose to accomplish using pluggins for their favorite browser.
Everybody has their favorite browser for one reason or another, but pretty much all of them work just fine for what you'd expect a default browser to do. The simple fact is that installing a different browser and making it the default is trivial on any computer these days, and especially trivial using Ubuntu. Most anything they'd use as a default browser takes up so little space that leaving it in place and simply not using it should be a non-issue, and if you want to remove it, you can. sudo apt-get purge firefox ta-da!
I just tried it, and the only thing it took with it was a bunch of firefox addons I'd installed through repos, a Unity pluggin that I didn't use, and a remote log-in config package I didn't use.
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