A bit slow
Update: Hi, you were right. I was investigating in a private tab. An extension called "600% Sound Volume" was really messing with my Youtube subscriptions page with this extension on. While looking through their extension reviews, I also found that their extension apparently injects code or something. Anyways, yeah, I removed the extension, and everything is fine now. I increased the rating to 5 stars, as it does everything I need it to. Thanks