Hey just so you know, this whole "they don't care about privacy anymore" is 100% fucking nonsense. Mozilla does not say that they can use your data however they want. This is also part of the terms of literally any site you upload anything to; the service needs to say "you grant us the right to do things with your work so that our service can actually function." For example: uploading a picture to Bluesky? Bluesky asserts the right to transform your work so that they can generate a thumbnail of the picture you uploaded.
That's what these terms always mean. It's never about a service or a piece of software asserting ownership of your data. It's about you granting them a baseline level of permissions so that they can actually do the things you need them to do with the data you give them. This type of "company is stealing your work" scaremongering makes the rounds every few months in art communities and every single time someone has to clarify that companies are not stealing your work.
Mozilla is not claiming ownership of your work. Mozilla is not throwing privacy to the winds.
Instead of watching a clickbait video that perpetuates the same stupid misunderstandings, maybe go directly to the source and actually read what Mozilla has to say about it?
Also, Brave is the second-to-last browser you should be using (behind Chrome). Brave has engaged with scummy shit such as:
Replacing ads on pages with its own ads and taking a cut
Putting their own affiliate links in search suggestions
Installing a VPN on Windows without notifying users
Numerous partnerships with cryptocurrency firms
If you want a reliable browser that's not Firefox, there are plenty of options like Orion, Waterfox, Ungoogled Chromium, Arc, etc.
Brave is not it.
EDIT: But also just keep using Firefox.