I tried many extensions and this one offer the best result. Keeps the text, so you can search a word or copy/paste from the PDF and lets you clean the page easily before. So good!

Works on Firefox 56 and ready for Firefox 57.

EDIT: good to print the text and also some pictures of a web page, not to keep a perfect copy of a web page in PDF.

URL:
https://www.brit.co/unusual-pizza-toppings

I wrote before:
Quite a usable tool. But without options to set, it removes also images that i would like to keep. My suggestion is, to add a feature that allows to configure the options or settings for each image: to allow or hide.

You answered:
It should keep all the images by default. Can you provide an example site where you are experiencing the problem?