That advice will no longer be viable as of January, when Manifest v2-based extensions will no longer work in Chrome. Translation: We made them too powerful, we put this genie back in its bottle This approach prevents the extension user from getting an installation warning that the installed code can “read and modify all your data on all websites” – which may sound scary, but is generally what you want when using an add-on that cleans up all the web pages you visit.īut this permissionless approach means that the extension cannot perform operations supported by uBlock Origin, such as custom JavaScript injection or redirection filtering, content security policy (CSP) guidelines, URL parameters, and cosmetic page elements. This function replaces the webRequest API of MV2, which allowed a JavaScript event handler to modify network requests and was the primary mechanism for intercepting unwanted network content.Īs Hill explains in his commit text, his extension declarativeNetRequest to fulfill Google’s stated goal for MV3 not to require the broad “read/modify data” permission.

UBO Minus relies on the declarativeNetRequest API in MV3 to block content. Worse still, 95 per cent of websites that fiddle with their domain records in this manner leak cookies, which sometimes contain sensitive information.Makers of adblockers and browser privacy extensions fear the end is near

As we reported last week, privacy researchers recently found that the presence of CNAME trackers has increased 21 per cent over the past 22 months and that CNAME trackers show up on almost 10 per cent of the top 10,000 websites.

Such domain cloaking – obscuring who controls a domain – undoes privacy defenses, like the blocking of third-party cookies, by making third-party assets look like they're associated with the first-party domain.Īs privacy barriers have gone up to prevent marketers from gathering data from web users, CNAME manipulation has become more popular. AdGuard on Thursday published a list of more than 6,000 CNAME-based trackers so they can be incorporated into content-blocking filters.ĬNAME tracking is a way to configure DNS records to erase the distinction between code and assets from a publisher's (first-party) domain and tracking scripts on that site that call a server on an advertiser's (third-party) domain.

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