add link to load extension blog post (cypress-io#2414)

* add link to load extension blog post

* Update browser-launch-api.md

Co-authored-by: Ben Kucera <14625260+Bkucera@users.noreply.github.com>

source/api/plugins/browser-launch-api.md

@@ -6,7 +6,7 @@ Before Cypress launches a browser, it gives you the ability to modify the argume
 
 This is helpful to modify, remove, or add your own arguments.
 
-The most common use case is adding your own chrome extension.
+The most common use case is adding your own web extension - [example recipe](https://www.cypress.io/blog/2020/01/07/how-to-load-the-react-devtools-extension-in-cypress/).
 
 # Usage