Firefox has the feature to take a full page screenshot as part of built-in developer tools ("3-bar" menu button or Tools > Web Developer). 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 The (default) file name is "Screen Shot yyyy-mm-dd at HH.MM.SS.png" and the file is saved to the Downloads folder. You can right-click and select "Inspect Element" to open the Inspector (Firefox/Tools > Web Developer) and have access to the developer tools including the cogwheel icon to access the toolbox settings and find the "Take a fullpage screenshot" (camera) button once you have enabled this button.