My problem:

 - 1) open http://www.webscorer.com/resources/templatestart using `Firefox`
 - 2) click on `txt` file 
 - 3) using `autoIt` on dialog box I check `open in Firefox`
 - 4) `txt` file opens in new `Firefox` window

My question:

How to check content of this `txt` file opened in new `Firefox` window?