Open URL Action
The Open URL object is great for opening a URL, in a way similar to creating a custom search.
Using the Open URL Action
You can either type your URL in the top field, or import it from an existing custom search.
Using a URL without a {query} will open a fixed website URL. Optionally, including {query} will fill this with the argument you've passed through from the previous object in your workflow (e.g. a search term for Pinterest).
When adding this action, the URL will be opened in your default browser. If you prefer, you can specify which browser to use (e.g. use Google Chrome to open videos that require Flash).