Extension for Chrome, which tracks changes on web pages

Question

I'm looking for a tool which will periodically (this period should be adjustable) scan a list of web pages for any changes. And alarm me when there is any change (amount of change for the alarm should be selectable) on any of them.

I'm looking something like the famous Firefox extension Update Scanner. But I need something that works with Google Chrome.

Can you please name one for me?

Answer 1

Page Monitor seems to be the only option. It has a lot of alert options, although it doesn't seem to have a threshold option like Update Scanner. But it does have a custom mode (selector and regex are the options.)