Originally reported here: http://www.reddit.com/r/firefox/comments/16ugsz/how_make_a_full_page_screenshot_with_the/ I can verify that I can't get proper suggestion for screenshoting the full page.
Documentation is incorrect -- needs to clarify to use double dashes when using parameters. i.e. screenshot filename --fullscreen. The help popup talks about the parameters, but does not specify that you need to put "--" in front of them.
5 years ago