Ad-blocking/pop-ups not working as they are meant to

I have noticed when using this site here “https://123moviesfree.net/home#” to stream my videos, even with pop-ups blocked in the settings, they still appear. Any advice as how to fix it. If you want to test it out yourself, open a movie or TV series and click the play button. A new tab will open automatically even with pop-ups blocked. Any advice is much appreciated