1. It messes up icon location in Firefox's Hamburger Menu. Just try to put additional icons after icon of this addon and you see multiple empty spaces.
2. Instead of just simple saving page to pdf it tries doing something else that at the end It dowsn't save page as it looks because 'for security reasons it doesn't support pages where servers identifies user'.

Will not save the page I requested. It saves a page randomly from the entire file; it will not let you pick and choose what to save as PDF

Simple to use and just works. Just need to add 'button' as per instructions. Free version adds a little advert for Pdfcrowd to bottom of page but then it is free! Using version 1.11

I wanted to use it for this site: https://www.lifewire.com/edit-received-message-outlook-1173780
But it garbled it up.

Personally it is a very good tool of the best that there is to download information of the web and to have it in an easy document, censillo to use.