Additionally, Poper Blocker receives and analyzes data about visited sites. Each URL you visit is checked against a remote database rather than a local database in order to identify the necessary blocking solution. Our users help Poper Blocker map all websites that show popups, overlays and popunders. The Overlay Blacklist feature automatically disables annoying overlays that take over the screen on certain websites, forcing you to log in, restricting access because of your country, or otherwise wasting your time. ☞ Whitelist sites that you wish to support This gives us focus and puts us at an advantage both in terms of accuracy and lightness, beyond your standard popup and ad blocker for Firefox like Adblock Plus, AdGuard Adblocker, AdBlock for Firefox, etc. Poper Blocker is a single-purpose extension that works side-by-side with adblocks, focusing on popups and popunders. ★ Easy on CPU and memory, works complementary to adblock extensions ★ Unobtrusive notifications let you know when a pop-up has been blocked ★ Most efficient popup blocker for streaming sites, torrent sites, and adult sites

★ Advanced algorithm identifies the correct block for each unique popup for industry-leading accuracy in blocking pop ups in both new tabs and new windows Poper Blocker intelligently blocks spam pop-ups on any site, including javascript popups and overlays. Improve your Firefox browsing experience by blocking pop-ups and pop-unders.

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