General
  This page manages which plugins (also known as addons) are installed.
Manage Repos
  If your webserver has the necessary write permissions, you will see a button labeled Manage Repos, which opens a control panel for managing what plugin repositories are installed. These repos are stored in extend/addon/[repo name]/. The official Hubzilla plugin repo can be added by entering the repo URL https://github.com/redmatrix/hubzilla-addons.git and choosing a name for the repo such as official. You should see this repo in the list similar to the following: