How to stop random ads that cover the video viewing

Hello to everyone. Someone knows how to stop / remove the type of ads that you see below ? https://preview.redd.it/g5m9l29uxire1.jpg?width=865&format=pjpg&auto=webp&s=e678576af6df5f84f7eef26280ca01934430b46f They appears randomly and they require that I click inside the green circle and on the close button. I would like that they does not appear at all. My browser is Firefox. submitted by /u/loziomario [link] [comments]