OK

did not work at all , a piece of shit

Does not capture the whole page, only the visible part.

verdaderamente algo que si funciona sin problema

I took a chance and I'm glad I did. It shows up like a doghnut in the extension area, one click and it instantly saves the web page you are one. What's better about this one is when I open the images in windows 10 they open at 100% page size - you see the whole page view, then you can zoom in in very high quality. I haven't tried to customise so don't know if it does other things, I'm very happy.

This works well, is easy to use and is non-obtrusive. For web pages with modern CSS which may have some dynamic effects when viewing, it is a good idea to manually scroll to the bottom of the page before using the capture tool. Otherwise the captured image may not appear as expected.

04 Jul 2021: I have just found another problem, when I try to capture this webpage https://www.zhornsoftware.co.uk/bart/index.html the PNG file is 0 bytes long.

16 Feb 2021: There seems to be a problem. Saving long pages no longer seems to work correctly as the bottom part of the saved page has lots of missing rendering.

Original Review:
I've been using Firefox's internal screenshot capture, to capture full web pages to file... - this takes 4 mouse clicks, and doesn't allow modification of filename.
This add-on is just what I was looking for, with the ability to create your own filename format and a simple 1 click on the toolbar icon to save the web page.
There are issues if you include either the pages URL, or Title into the filename though, where quite often, the page doesn't save (Yellow dot next to Download Icon). I'm assuming this is either invalid filename characters or filename too long causing this problem. An option to truncate the filename to a maximum fixed length would be a start.