Changing the page title of the registration page

I would like to change the page title text in the browser to include my site name along with some other text. Where I can find where this is stored?

In addition at the top of the page it just says "Registration" and I would like to edit that too?

I just discovered a similar issue with the profile page just stating the user name. I would like to change this as well.

It seems neither of this text is determined in the menu under "Page Display Options".