And since you won't be able to modify web pages, it will also mean the end of customization, either for looks (ie. DarkReader, Stylus), conveniance (ie. Tampermonkey) or accessibility.
That's a good way for me to never visit your website again. Honestly, this kinda sounds like the death of the internet if I'm being honest. This would transform it from a free medium into a full blown corporate dystopia. It's really scary to see the digital (corporate) development over the past couple decades. Would be really cool if we don't move further towards some cyberpunk like future where megacorps control everything.
That really is the solution. We desperately need to make our own websites again and boycott the shitty corporate controlled ones. If we can replace Reddit with Lemmy, we can replace every other piece of shit site or app they come up with too.
I think the level of government capture in the US is unique. The EU is kinda balanced, as many good things as bad in this regard, while the authoritarian part of the world is definitely not corporate controlled.