Book Burro requires Firefox or Flock. If you aren't already using one of those browser, you can install them via:

Clicking the big green button above. If this notice appears, you will need to add this site to your browser's whitelist:

1. Click "Edit Options..." in the bar. The Firefox "Allowed Sites" window will appear.
2. Click "Allow" to add Book Burro to the list of allowed sites, then click "OK".
3. You will need to click the "Install" link a second time to begin installation.

After Installation you will have to restart your browser

Click on the menubar: Tools -> Book Burro

Now you can select what stores, libraries and other online services Book Burro uses.