Wide-spectrum blocker for browsers with a simple point-and-click interface to allow users to filter and block server requests, domains, scripts, and more. By default it blocks ads, trackers and malware sites. With dozens of free ad blockers out there, what makes uBlock Origin so special? For starters, it uses less memory than the others, so it doesn’t slow down your browsing experience. It’s also been found to effectively block more ads than any other ad blocker. uBlock Origin also lets you create personalized lists, giving you more control over what ads to block and what ads to allow.