I would love to use something better than ABP (in terms of performance, it does content filtering just fine), but I'm not so desperate to abandon the (warning: subjective content ahead) greatest browser of all times to lower the memory footprint of an ad blocker.
Would be nice if someone forked and start to adapt to Firefox. I would of course work in concert as this would allow to identify parts of the code which is browser specific and which parts can be turned into an independent library.
It however would be really awesome for HTTPSB (which I just installed on chromium and fallen in love instantly with) to be ported to firefox.
Seeing all the privacy-related features treated, by domain/site/everywhere rules, being able to block separately js/plugins/cookies (and by the way, the matrix is a great idea, a lot more useable than anything else out there)... in one extension only. Great work already, gorhill!
(I did upvote the comment but I want the creator of the extension to know that more people are interested)
https://github.com/alyandon/requestpolicy/commits/release-0....
Caveats are:
1) I have absolutely no intentions of continuing any work on my hack. The changes I made meet my needs. Feel free to fork if you need additional features.
2) I don't pretend to be an elite javascript developer. I have no idea if my hacks are considered idiomatic javascript or not. I also make no promises that running my hacked version of this extension won't upload all your private data to a server in Russia or cause other problems like having your hard drive explode in a ball of fire.