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