Excellent points. There are indeed two Zurich articles. One way to get to the city is to search for Zurich and open the second one, which goes to the city directly. The xref in Zurich (canton) is indeed a disambiguation bug (identically named articles); thanks for catching that.

I haven't tested the article search box on the article viewer in Firefox. I'll look into that as well.

Making the title linkable is a great idea and it will be implemented shortly. Thanks for catching all of this.