Firefox history shows only page titles and I am always glad for the "Hacker News |". Though I wouldn't mind it being shortened to "HN|". But then again, page titles are prominently picked up by google and the ilk, so I suppose that will have to factor into the decision somewhere.
Not true, it shows favicons too in the default which makes the HN bit superfluous IMO. Also if you want listings by domain then choose the "date and site" view. Simples.