Framing this as needing "consent" is deeply misguided. It's as silly as claiming that Microsoft Word installed an English language spellcheck dictionary without your consent. It's just part of the software. You consented to installing the software and having it autoupdate. That covers it. Now we can argue whether or not it's an appropriate amount of disk space or bandwidth to use, but that's just a reasonable practic…
A browser is for browsing. Going to websites and using them, in the way we've been used to for decades.
To suddenly use it to install an AI model on your machine, is way beyond the expected scope. There's nothing "auto update" about this, nor is it required functionality.
If anything is dangerous, it's you framing this as if you get to control how the conversation is had.