Security Issues with browser add ons

I see this add on in the IE7 browser on my home Vista computer  and on the add ons at my work XP computer with IE6

 

Name                    Publisher          status       type                       file

Research               (none shown)    enabled     browser extension    (none shown)

  

Now it is enabled on my work computer and disabled on my home computer

1. Which should it be, enabled or disabled?

2. What is it?