Hello all, First of all thank you for the good quality of mozilla products. I am using mainly firefix and thunderbird on linux (Ubuntu) on all my computers, that of my children and of any friend I can convert to open-source computing. I have done all possible documented actions to configure firefox for blocking pop-ups, including standard (permissions in privacy & security settings) and advanced (filter on autoplay parameters in about:config) options available. I keep receiving pop-up windows with unwanted videos, e.g. on my paid subscription to a local news website. See the attached screen capture, where I right-clicked on the pop-up window. You will see that a "digiteka" player keeps appearing and I never sollicited these videos. I hate this. It's not even pub, it's news, but when I'm reading an article I don't want to be bothered with other news that I'm not interested in. Plus, I don't want any unauthorised software like this digiteka player running on my computer without my permission. It's not a firefox module, it's probably silently downloaded over my connection with my news provider with no notice. I could go as far as blocking autoplay so the video will not start playing automatically, but I would like to completely block the apperance of such windows and any download of something executable on my computer. What could I do in addition? I there any way, other than stopping my subscription to this site? Many thanks for your help. Patrice.