I would say the general persona is power user/tinkerer types who really like customizing their experience but until now really couldn't on mobile. However there

I would say the general persona is power user/tinkerer types who really like customizing their experience but until now really couldn't on mobile. However there's people who come to the browser for a very specific extension (e.g. improving their search for recipes http://share.insightbrowser.com/12 http://share.insightbrowser.com/12), and the world of extensions is very long tailed because you can spin up their own in under a minute.