Google's next Chrome update will significantly disrupt most ad-blockers. It's closing a loophole, though Google is promoting the change as a security and performance measure.

The update will finally complete a major overhaul in the system Google uses to let browser extensions work with Chrome. It's changing from a long running system called Manifest V2 to a new version called Manifest V3.

At the moment, many of the most effective ad-blockers use dynamic filtering. That means they don't simply block content from specific sites, but rather use a constantly updated set of rules to assess whether a particular part of the page is an unwanted ad.

End of Dynamic Filtering

Manifest V3 brings two major changes that affect ad-blockers. The way it works eliminates dynamic filtering altogether. It also significantly limits the number of fixed rules an extension can apply to data it accesses on a site.

This means the full-blown versions of most ad-blockers will simply stop working. Instead, users will likely have to settle for a "lite" version which simply blocks a much smaller number of ad sources, with no intelligent filtering or live information. (Source: androidpolice.com)

Although Google officially withdrew support for Manifest V2 last year (which originally debuted in 2012), the implementation did allow some workarounds which ad-blocker developers exploited. Those workarounds will disappear with Chrome version 150, rolling out imminently.

Security Versus Choice

A Google engineer wrote that "We won't be able to provide / maintain [Manifest V2 support] indefinitely due to the complexity and tech debt, as well as the security risks it entails (we've actually found a number of bugs that are specific to MV2 lately). Of course, other browsers can continue supporting these if they so desire." (Source: pcmag.com)

Ad-blockers remain a highly controversial topic online. Critics argue that they make it almost impossible for many websites to cover their costs and that viewing ads is the "price" of accessing free websites. Supporters say that they don't necessarily object to the principle of ads, but that some sites use so many as to make the site unusable. They also point to privacy and security concerns about poorly or even maliciously crafted ads.

What's Your Opinion?

Will these changes affect your choice of web browser? Do you believe Google is prioritizing its share of ad revenue over user experience? Is it fair for websites to block users who use ad-blockers?