[blue_pants]

Thanks for extensions.

But I think there's no need to integrate its functionality to the site. This way one can choose how to customize the site without increasing complexity of the site itself.

[mkdirp]

Sorry! I meant to integrate the favicons into the extension, not to integrate the extension into the website :)

[kzrdude]

With inline reply HN would decrease the number of requests needed to make replies, so it sounds like a net gain.