This is by far the most useful extension I've used. Saved me from nasty attacks. Please update for firefox quantum, I just downgraded to firefox 56 exclusively for this add-on.
As of v2.5.1
Been using this now for well over a year since v2.3, I switched from adblock plus and I'm never turning back. It works better than adblock plus, and is lighter than adblock lite. I like to be on the bleeding edge of things, currently using firefox developer edition v40a2 and this add-on will not work if you enable firefox multi-process, will only work with multi-process disabled. Multi-process was developed to improve system performance by putting the firefox GUI in a separate process from the browser framework.