Guide to the Happy Aquarium Toolbar: Install and get 10 Free Pearls!
But simply downloading the bar isn't going to get you the 10 Pearls. After installation (which should take less than 5 seconds), you're going to have to restart your browser.
Now it's time to turn on Happy Aquarium. You can do that just by clicking on your shiny new toolbar, which should earn you some coins.
If you hate the toolbar, uninstalling it is a cinch in Firefox. Just go to the top of your browser, click on Tools, Add-Ons, click the Uninstall button for the "Crowdstar Gamebar", and finally, restart your browser.
And the best part of this is, you get to keep the Pearls!