You can use this feature in Internet Explorer.
You simply have to add one of the following links to your browser's toolbar, or add it to your browser's favorites/bookmarks.

Steps

1. Right-click one of the link and point to “Add to Favorites”, and click “Yes” to the security message box.
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2. Select the folder Link to add the EasyBook bookmark to your links toolbar. Click “OK”.
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3. Result, once added in the link toolbar:
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After that, you can use the link to automatically add any site that you're viewing directly to your GetBoo account.

Since these links depend on JavaScript, you browser must be enabled to support it.
Also, if you use the pop-up option, you will need to configure your pop-up blocker to allow it.