edit: Apparently it is free. Your website is incredible confusing and misleading. I read through it, saw the "Pay what you want" bit. Entered 0$ but nothing happened, no new button or something. So I assumed it was not available for free. I also did not see what browsers were supported.
I only found out that it works for Firefox on Github. That is also where I saw the GPL. And then I got curious what the "Get Disconnect" button might have done so I returned and clicked. And to my surprise it gave me an extension installation prompt...
The UI of the extension is completely opaque to me. What is "secure Wi-Fi"? I am not using Wi-Fi. What means "secure search"? No mouseover tips and https://disconnect.me/d2/help helps me nothing. I am not even sure what the things are that page talks about.
What are the Facebook, Google+ and Twitter counters/buttons for? I am not using those sites and I thought your extension would block their tracking. Why does it reload the current page if I click on those buttons?
I loaded a random page. There is a 8 on the DM icon but if I extend the dropdown it just shows 1 Analytics item. In the list that item has a ticked checkmark. Does that mean it is allowed? I do not want that tracker allowed. I thought you blocked automatically?
Please consider having a feature stop and work on the UI next. Right now I could not recommend this to my most technically versed friends because I am not understanding it myself.