Cname-based tracking increasingly used to bypass browsers’ antitracking defenses

• uBlock

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FTA:

> And because most anti-tracking works on the principle of filter lists, the CNAME cloaking scheme effectively renders most browsers’ anti-tracking defenses ineffective, he notes.

> “As of today, from the major web browser vendors only Firefox offers defenses. Since uBlock version 1.25 under Firefox, the extension dynamically resolves hosts and sanitizes such requests if a match is found. Such a measure does not work under Chrome because this web browser does not offer a way for extensions to dynamically resolve hostnames.”

I assume he meant uBlock Origin (rather than uBlock) as it introduced uncloaking of CNAME requests as of version 1.25.0 for Firefox: https://github.com/gorhill/uBlock/releases/tag/1.25.0 .

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  An advanced DNS stub with Freedom, Privacy and Security --- THRICE UPON A TIME

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