This is a very good. i use it daily on genealogical archives eg newspapers. This version works on FireFox 56 with check compatibility which can be found https://web.archive.org/web/20191029180454/https://legacycollector.org/firefox-addons/index.html but you need to use print screen keyboard button then paste it into an application like paint once there crop out the required bit and save. its a shame that the download link wont work perhaps you can sort this out and then it will work flawlessly. this is one of the only apps which work on genealogical archives fully. reason i am using ff56 is because there are several other addons which were not able to be ported to new ff versions