Yeah I have Galaxy S2, I found out how to do it a while ago (but still, it wasn't obvious).
Okay I figured out why Adaway/Adfree are not as good as Adblock for Firefox. The two apps block ads by editing the hosts file, but that only works for specific addresses, compared to ABP, which can block ads based on wildcards (ex: blocking *doubleclick* will block any link that contains the word "doubleclick"). There's absolutely no way that Adfree or Adaway can block 100% of ads, or even close to 90%, since they would have to update constantly and find out every single link to every ad on the internet.
I guess this doesn't matter too much since I can't watch hulu or nbc on my Android anyway, so there's not much to block.