The resources are highlighted in blue in the uBlock Origin interface when all connections of the active site are displayed. The latest uBlock Origin version for Firefox looks up non-blocked resources to uncover first-party tracking and block these attempts.
The problem with the manual approach is that it is very easy for sites to change the redirects or even use automated means to switch subdomains. Content blockers have a hard time identifying these redirects, and most use a manual list of known domains. Some sites may use a relatively new tracking technique that uses canonical names (CNAMEs) to bypass content filters and ad-blockers.īasically, what the sites do is disguise an ad-tracking or serving domain by using a first-party domain, e.g.
The latest version of uBlock Origin for Firefox, version 1.25 or higher, will "CNAME-unlock network requests".
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