[quicklime]

Actually, at the time, I would've been perfectly happy to have just imported the passwords into Firefox!

But I don't think it is able to import them, at least not on my machine. I'm using the latest Chromium/Firefox on the latest Ubuntu, and I just had another look. When I select the option to import data from another browser, I get a dialog that says:

Import Preferences, Bookmarks, History, Passwords and other data from: Chromium

When I select Chromium, I see a list of things I can import:

Select which items to import: [x] Cookies [x] Browsing History

For some reason, "Passwords" does not appear in the list, and when I browse to a site in Firefox, it doesn't use the password that Chromium had stored.

Maybe this is an OS-dependent thing?