Add note to docs site in README

Author: keithamus

README.md

@@ -2,6 +2,8 @@
 
 This library allows websites to maintain compatibility with older browsers, which do not implement newer features. It does so using [polyfills](https://developer.mozilla.org/en-US/docs/Glossary/Polyfill) for small new features, plus functions to determine if a browser supports a set of features natively or with polyfills.
 
+If you would like to see what features the browser you are currently using implements, you [can visit the documentation site](https://github.github.com/browser-support/) which displays a compatibility table that detects which features are natively supported in your browser.
+
 ### How is this used on GitHub?
 
 We use all of these polyfills on GitHub.com. We also use the `isSupported()` function to determine if the browser meets a minimum set of functionality which we expect, browser that return false from `isSupported()` do not send errors or statistics to our backend monitoring.