This extension has some limitations if you're using it in Chrome based web browsers.
There are just slightly a few more features that allows you to play around with additional options to convert a web page to PDF when this add-on is used with Internet E xplorer 11 and Mozilla Firefox. See how it is done here:
However, you can achieve a better webpage to PDF conversion result if you fetch the website(s) directly from Acrobat using its built-in "PDF from Web Page..." feature. Refer to the second link I posted above.
If this is what your inquiry is related to, then just click on "File"--->>>"Create"--->>> and select from the context menu "PDF from Web Page...".
The wizard will guide you through the conversion settings, and most of the steps are self-explanatory.