Firefox: Easily screenshot a whole web page

It's as easy as one-two-three:

1. In Firefox, press Shift+F2.

This opens up the Firefox console at the bottom of the screen which enables you to issue commands right from the webpage.

2.  Enter the following command and press Enter:

 screenshot --fullpage

 3. A screenshot image file of the whole web page will be made in your Downloads folder.

To close the console, simply press Shift+F2 again. You can use this command with different parameters to achieve different results:

--fullpage

Takes a screenshot of the entire web page even the parts not scrolled to.

--delay <number>

Takes a screenshot after the specified delay (in seconds).

--clipboard

Takes a screenshot and copies it to the clipboard.

--chrome

Takes a screenshot of the whole Firefox window, not just the webpage.