Albeit, the amount of memory consumed may well increase no matter which browser you use, though Mozilla seems to be only one on the look out.
Instance given, PC running Firefox without AdBlock consumed 194MB of memory. Whilst 417MB was the case with AdBlock on. And in another test, memory usage jumped from 370MB to a whopping 1,960MB with the AdBlock plugin enabled.
Nicholas Nethercote, a developer for Mozilla, in a blog post appealed on ABP authors to work with them to reduce this overhead. In the meantime, it’s worth keeping these measurements in mind, particularly, if you hear people complaining about Firefox’s memory usage.