Entire program suddenly vanished from Firefox 87.0. Nothing in toolbars, not listed in addons list, but this page has a "remove" buton on it still.
Turns out they listed it under "Take.." in the addons list, but the addon begins with "Full.." on the addons.mozilla.org site so you can't find it! They also used the similar "S" for the icon in the toolbar as "HTTPS anywhere" thus making it appear that the icon had vanished. After reinstalling the program there are 2 copies listed in the addons menu, one of which is shown as disabled for some reason. All of this conspired to cause suicidal thoughts.

Advantages
Can capture entire browser window including toolbars, or specific sections.
Converts to PDF instantly, very fast

Disadvantages
Not free.
Why not make it easier to get to the editor window? It's not mentioned in the docs or video.
Needs better documentation including: Videos with a narration
Written documentation needs an update as it refers to an older version

Works well, however cannot successfully take screenshots to save when a webpage is on Firefox's Reading Mode. If you use Reading Mode a lot and want to gett a screenshot of it all, you might need to look at another extension.

This Add-On works pretty good and does exactly what is advertised...it makes screenshots ;)

A nearly perfect tool for capturing images and full pages from the web. The only way to improve it would be to add a save to ebook format.

outstanding add-on. Saved me hundreds of hours in getting snapshots. Thanks. Bravo !!

Great addon with really useful options.

Wonderful add-on that helps me to document the corresponding results when doing research on the net.

This is a very simple and very good extention. It made our life very easier and quickier.

Very good for taking entire webpages (visible and in-visible parts of your screen). Easy steps and wonderful work flow (quite a few useful settings) for what I use it for..

Great for sending clients screenshots of websites before live and also working with Tech supoprt to show issues. Recommended +++

Very useful I could not do without it :)