I actually write private extensions to enhance websites that suck. As an example, I have added folders/category tags to my YouTube subscriptions. While it's a

I actually write private extensions to enhance websites that suck. As an example, I have added folders/category tags to my YouTube subscriptions. While it's a security issue, I would love the ability to inject content scripts via bookmarks or URLs so I could use these enhancements on my mobile devices. Perhaps making certain websites installable web apps and enhancing their UI to fit better on mobile browsers.