How it works
1. Open the Chrome extension on any page
2. Check the URL and click enter
3. See the HTML, JS and CSS feature that is not supported on the site and affect SEO rankings.
About
Can I use” provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers? So you can run this on any page and get a response of all the features that are used on the page and not supported.
What does this tool do?
This tool displays and non-exhaustive list of HTML, Javascript and CSS features a page is using which are not supported by the Google Search bot or popular browsers.