See: *https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem If this is a screenshot from a web page then you can use built-in Firefox means. Firefox has a setting in the web developer toolbox settings to add a button to the toolbar of the Web Developer toolbox to take a full page screenshot. * https://developer.mozilla.org/Tools/Tools_Toolbox#Settings * Available Toolbox Buttons: Take a fullpage screenshot See also: *https://developer.mozilla.org/en-US/docs/Tools/Taking_screenshots You can attach this file to an email if you want to send it to somebody else.