This is just a re-skined FireShot (from susbox). Also the screenshots here in the addon page don't match with what the addon actually looks like, and it doesn't even have the right icon. Also the publisher is just called "Screenshot". Very suspicious. Probably contains malware or adware.

installed it with latest android firefox, tried on my ditect ferries booking page, nothing worked.

I don't like when I see "This page can be captured better with the advanced features installed. ...... Try advanced features..."