This page contains step by step instructions on how to download any YouTube video in the Mozilla Firefox web browser without the assistance of any software programs, apps or extensions.

Most websites with video, including YouTube.com, employ a web programming technology that is very effective at preventing its website visitors from downloading that video. This technology allows the video to play without revealing the true source or url of the video.

The trick to bypassing this and downloading almost any video in the Firefox web browser is to make Firefox behave as if it is a mobile phone. This will reveal the true web address of the video so you can download it.

To download a video from any website, including YouTube, without installing any extensions apps or software:

  1. In the Firefox web browser, go to the web page with the video you wish to download.
  2. Press the F12 key on the keyboard to open the developers ...