The extension basically measures the Google Core Web Vitals. It will highlight the Cumulative Layout Shifts in the page and as well as the Largest Content in the page, which helps the developers to understand the HTML elements that contribute to the scores. More over in the developer console, it also log the HTML elements that made a layout shift. This will make the developers easily identify the HTML elements to fix.
You can Follow the below Step By Step procedure to install the Core Web Vitals Chrome Extension to your Chrome Web browser.
It is the Core Web Vitals Chrome extension download link you can download and install Chrome Browser.
Measure metrics for a healthy site
Annotate a website with the Core Web Vitals
Test and debug cumulative layout shifts (CLS) in the browser
Visualizer the CLS of any webpage
Google Chrome DevTools Extension for analyzing DOM size
Show the Core Web Vitals data from the Chrome User Experience Report in the Google Search Results.
Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.
View Web Vitals metrics for the websites you visit and quickly navigate to external web performance testing tools.