This isn't how extension development works? The APIs for calling the notify methods already exist. Depending on how their tools work the diff could have been 1

This isn't how extension development works? The APIs for calling the notify methods already exist. Depending on how their tools work the diff could have been 1. A list of one website on which to notify 2. The static content to display on that website in a predefined (provided by the browser) popup context. While I grant what you're saying is possible given the dev's access rights, it's not required for the functionality described in the article.