Show HN: hnpc – Highlight New/Updated Posts & New Comments (User Script) (github.com)

You can install it by grabbing the user script: https://raw.github.com/michaelschade/hnpc/master/src/hnpc.us...

Here are two pictures showing it in action:

* https://github.com/michaelschade/hnpc/raw/master/examples/po...

* https://github.com/michaelschade/hnpc/raw/master/examples/co...

This uses a browser's Web Storage, so all information is stored locally.

You might be also interested in the Google Chrome extension

https://github.com/wuzhe/social-hotness

Preview:

https://github.com/wuzhe/social-hotness/raw/master/screensho...

I wrote one of these as well as a Chrome extension a few months ago.

https://chrome.google.com/webstore/detail/kikfikaiccdaabdilg...

Additionally, it will highlight edited comments in grey or any color of your choosing (simply md5's the comment text and checks to see if it's changed next time you load the page).

In a related vein, http://hnnotify.com provides comment reply email notifications if you want to know when someone replies to you on HN (Disclaimer: I am the author)

Nice script - very useful. I made it into an Opera extension:

https://addons.opera.com/en/addons/extensions/details/hnpc