How to Enable Strict Site Isolation via Chrome Flags Open Google Chrome: Launch the Google Chrome browser. Access Chrome Flags: Type chrome://flags in the address bar and press Enter.

Tracked as CVE-2025-6554, it is described as a type confusion flaw in the Google-developed V8 JavaScript engine that compiles and executes JavaScript code in Chromium-based browsers.

The browser is doing so as part of Google's plan to phase out older Manifest V2 extensions to bolster Chrome's security. Still, some uBlock Origin users aren't happy about the change.