Can I use this client-side? From what I read on the page this seems to be only geared towards a certain server-side-setup with node.js, brewer and stuff.
Yes you can. If you check out http://brick.mozilla.io/v2.0/docs/getting-started - Node and bower are used in order to install the library locally. You can also download the project from Github ( https://github.com/mozbrick/brick ) and just copy-paste the needed files in your project. You can search for them in the 'dist' sub-directory.
Plus most of the demos do not wort (tried in chromium).
I don't believe in this thing.