Clarifying the Future of Firefox Screenshots

What is changing is that in 2019 users will no longer have the option to save screenshots to a standalone server hosted by Firefox. While some users made use of the save-to-server feature, downloading and copying shots to clipboard have become far more popular options for our users. Starting in Firefox 67 which is released in May, users will no longer be able to upload shots to the Screenshots server.

Source: blog.mozilla.org