If you are satisfied with the free addon, the support provided and appreciate the work and want the development to continue in future, Pls. write a review at https://addons.mozilla.org/en-US/firefox/addon/easy-youtube-video-download/reviews/add . Honestly, it is really disappointing that thousands of satisfied users do not leave a review and the very few unsatisfied ones do, discouraging me to invest efforts into this non-profit, hobby project.
Pls. it's a small favor in return of my free service and support.
Pls. feel free to email firstname.lastname@example.org if you face any issue to get it resolved at the earliest.