This is an absolutely essential add-on for Firefox and honestly I'm surprised it's still not on Mozilla's official Recommended Extensions list yet. Even with everything on Firefox set to strict I still had a bunch of unwated/intrusive/security-risk popups showing up on various sites, but since getting this add-on I even forgot those exist on the web. It's impressive to say the least. Thanks to whoever made this !
A very useful & need to have add-on when using your Firefox browser. I actually use two different ones to cut down on unwanted spam & ads which work great together & can both be found on my home page as I promote the ones I like.