The argument that "Google still controls Chromium so it's not good enough" is exactly the kind of FUD I'd expect to back up this kind of psyop, too.
I find this notion completely baffling. I use Chrome, Firefox and Safari more or less daily cause I test in all 3, and other than Safari feeling clunkier and in general less power-user friendly, I can barely tell the difference between the 3, especially between chrome and FF (well, other than uBlock working better in FF anyways).
I made some other changes, but I forget what. At least FF still has the full uBlock Origin.
News to me.
If this is even true, in the end it's still "so what?" Meaning, the alternative is even worse so, let's say granted there is this problem. Where is the better alternative that does not have this problem? Chrome doesn't have other equivalent or worse memory problems? Even if not leaking, it simply uses so much it's the same end result.
I've never consciously noticed a problem with youtube so if there is a problem, it's not one that necessarily matters.
It occurs to me that it could be a pathological edge case triggered by ublock and youtube interacting. I'm not going to disable it to find out.