Generates a host list of first-party trackers for ad-blocking.
DISCLAIMER: I'm by no way an expert on this subject so my vocabulary or other stuff might be wrong. Use at your own risk.
What's a first-party tracker?
Traditionally, websites load trackers scripts directly.
website2.com both load
https://trackercompany.com/trackerscript.js to track their users.
In order to block those, one can simply block the host
However, to circumvent this easy block, tracker companies made the website using them load trackers from
The latter being a DNS redirection to
website1.trackercompany.com, directly pointing to a server serving the tracking script.
Those are the first-party trackers.
trackercompany.com doesn't work any more, and blocking
*.trackercompany.com isn't really possible since:
- Most ad-blocker don't support wildcards
- It's a DNS redirection, meaning that most ad-blockers will only see
So the only solution is to block every
somethingirelevant.website1.com-like subdomains known, which is a lot.
That's where this scripts comes in, to generate a list of such subdomains.
How does this script work
It takes an input a list of websites with trackers included. So far, this list is manually-generated from the list of clients of such first-party trackers (latter we should use a general list of websites to be more exhaustive).
It open each ones of those websites (just the homepage) in a web browser, and record the domains of the network requests the page makes. It then find the DNS redirections of those domains, and compare with regexes of known tracking domains. It finally outputs the matching ones.
Just to build the list, you can find an already-built list in the releases.
- Python 3.4+
Just add them to
Adding first-party trackers regex
Just add them to