And if you wish to see some code, while simplePDF is not open source, the code for the embed widgets (thin iFrame wrappers), including the chrome extension, is

And if you wish to see some code, while simplePDF is not open source, the code for the embed widgets (thin iFrame wrappers), including the chrome extension, is available here: https://github.com/bendersej/simplepdf-embed https://github.com/bendersej/simplepdf-embed