uBlock Origin by Raymond Hill

Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.

Recommended

Available on Firefox for Android

4.8 (22,012 reviews)

10,436,904 Users

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Screenshots

[The popup panel: default mode]

[The dashboard: stock filter lists]

[The popup panel: default-deny mode]

[The dashboard: settings]

[The popup panel in Firefox Preview: default mode with more blocking options revealed]

[The unified logger tells you all that uBO is seeing and doing]

About this extension

uBlock Origin is not an "ad blocker", it's a wide-spectrum content blocker with CPU and memory efficiency as a primary feature.

Out of the box, uBO blocks ads, trackers, coin miners, popups, etc. through the following lists of filters, enabled by default:

EasyList (ads)
EasyPrivacy (tracking)
Peter Lowes Ad server list (ads and tracking)
Online Malicious URL Blocklist
uBO's own lists

More lists are available for you to select if you wish:

EasyList Cookie
Fanboy Annoyances
AdGuard Annoyances
Dan Pollocks hosts file
And many others

Additionally, you can point-and-click to block JavaScript locally or globally, create your own global or local rules to override entries from filter lists, and many more advanced features.

Free.
Open source with public license (GPLv3)
For users by users.

If ever you really do want to contribute something, think about the people working hard to maintain the filter lists you are using, which were made available to use by all for free.

Rated 4.8 by 22,012 reviewers

Permissions and data