[ernsheong]

You can achieve this using just the browser.

In Chrome Dev Tools, click on the devices button (the icon with the phone and tablet). Using the top-right menu, select "Capture full size screenshot".

Walla, you now have a full size screenshot that you can convert into PDF.

Incidentally, I am author of https://www.pagedash.com, which is a personal web scrapbook which allows you to capture the current page as HTML and generate links to share with others.

[superasn]

I tried it with this page only but it didn't work for me. Got a 110Kb png file but it's empty. It is a valid PNG but it's completely blank. Maybe it's buggy.