First off, search this forum for 'adblcok.ini'. It is Irons built in adblocker, but YOU have to populate it. There are lists you can copy (then paste) to that file from the web.
Here is one of them.>>> https://secure.fanboy.co.nz/iron/complete/adblock.ini
You need to do the paste with Iron closed.
Secondly, search the web for Adblock Plus(it is a beta at my last look). IT is NOT a Chrome(Google) extension, and is available for Iron and you can subscribe to several lists to it from within it's interface.
The first one is what I use.