User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:71.0) Gecko/20100101 Firefox/71.0
Steps to reproduce:
I have installed this 3 times coming to the same issue.
After install. Simply clicking on "Take a screenshot" activates but doesn't show prompts.
When clicked on from the url bar for the first time a message pops up stating.
"Whoa! Firefox Screenshots went haywire.
We're not sure what happened. Care to try again or take a shot of a different page?
The operation is insecure.
After which no prompts show up and you're unable to access any of the page you're wanting to screenshot until you go back in the url tab and "deselect" Take a Screenshot.
After selecting Take a Screenshot, the usual prompts allowing you to pick the size and dimensions of the target area. This issue didn't start happening until the nightly update within the past week.