Starting with Google Chrome 127, a warning will appear for uBlock Origin (uBO) users due to the deprecation of Manifest v2 support in favor of Manifest v3. Since uBO is a Manifest v2 extension, a warning will be displayed in your Chrome browser. The browser will suggest alternative extensions like uBO Lite (uBOL), which is a simplified version aimed at converting filter lists into a Manifest v3-compliant approach with a focus on reliability and efficiency. However, uBOL lacks many features present in uBO. Users must decide whether uBOL is a suitable replacement, as uBO will not be automatically replaced. Development of uBO will continue for browsers that continue to support Manifest v2.
https://github.com/uBlockOrigin/uBlock-issues/wiki/About-Google-Chrome%27s-%22This-extension-may-soon-no-longer-be-supported%22