I want an iPad for browsing leisurely from my couch or bedroom. I don't want to see web advertisements though, and I won't be able to install Firefox + adblock

I want an iPad for browsing leisurely from my couch or bedroom. I don't want to see web advertisements though, and I won't be able to install Firefox + adblock or some kind of ad filtering proxy on the machine. I suppose I could configure a transparent proxy on my network, but that sounds like a pain. For me the closed nature of the device might be a deal breaker.