[dubin]

One workaround that I've found around the new restriction is opening the "extensions" page in Chrome and simply dragging the downloaded crx file onto it. This should prompt an installation dialog.

[Semaphor]

That's what it tells you if you click the "Learn more" link:)

[eugenes]

That did the trick, good tip. Between this extension and the hckr news highlight new comments extension one can finally be productive reading hn.

Waitaminute...