Tracker Blocking Laboratory

The EFF Tracker Blocking Laboratory is an experimental fork of AdBlock Plus for OHM 2013 participants and other interested parties to experiment with. It autogenerates blocklists based on apparent respect for Do Not Track requests, as measured by the continued presence of third party cookies after a DNT: 1 header has been sent (eventually, this should apply only to high-entropy cookies and should also test for likely fingerprinting and supercookieing). CDNs and other sites that are not actually third party trackers may be "whitelisted" so that they are only cookie-blocked rather than completely blocked. Sites can also self-whitelist by agreeing to a privacy policy that the user or their client has specified as satisfactory.

The TBL is initially available for Chrome and installable from the Chrome Web Store. The source code is available from github.

Related Issues

Stay in Touch

NSA Spying

EFF is leading the fight against the NSA's illegal mass surveillance program. Learn more about what the program is, how it works, and what you can do.

Follow EFF

Backdoors have been discovered in Arris cable modems. This is why we need a security research exemption to the DMCA.

Nov 27 @ 2:15pm

Censorship powers, data retention, and vague hacking crimes: Pakistan's terrible cybercrime bill has it all:

Nov 25 @ 5:11pm

While Bangladesh blocks social messaging apps, locals are turning to Tor and Twitter:

Nov 25 @ 3:50pm
JavaScript license information