Comment 82 for bug 1687019

You know, if we're very lucky, we *might* be able to get away with doing this:

static bool urlRequiresFirefoxBrowser(const URL& url)
{
    return isGoogle(url) && url.host() != "accounts.google.com";
}

That's probably not very likely to work, but if it works, then we're saved. At any rate, just removing the Firefox quirk and leaving Calendar and Maps/Earth broken is not acceptable.