Security News > 2022 > August > AdGuard’s new ad blocker struggles with Google’s Manifest v3 rules
The first ad blocker extension for Chrome that is compatible with Google's Manifest V3 is now available.
The new ad-blocking extension that complies with Manifest V3 requirements comes from AdGuard, a developer of ad-blocking software.
The new AdGuard extension is technically weaker than its predecessor.
First, the new extension has to abide by a limit of 30,000 filtering rules and 5,000 dynamic rules set by the users themselves.
If the user has installed multiple ad-blocking extensions on their browser, a global limit of 330,000 filtering rules is applied, so AdGuard might have even smaller leeway.
Because the new syntax for the rules is very limiting, not all existing rules can be converted, including Cookie rules that block certain trackers.