https://blog.mozilla.org/nnethercote/2014/05/14/adblock-plus...http://www.reddit.com/r/programming/comments/25j41u/adblock_...
The only true fix is to remove it, although changing the ruleset and finding out which tab has humongous numbers of iframes is probably a good start: according to link 1 ABP has a static memory consumption of ~60MiB, plus 3~6MiB/iframe (since it's caused by the stylesheet size, I expect the precise ruleset impacts that)
