They have gone from:

Unlike other companies, we don’t sell access to your data. … Nope. Never have, never will. And we protect you from many of the advertisers who do. Firefox products are designed to protect your privacy. That’s a promise.

To (paraphrasing) “Ahh, well, we don’t have ownership, we just have a nonexclusive, royalty-free, worldwide license for the purpose of doing as you request with the content. We can also process your data as we describe in the Firefox Privacy Policy… Ah, and, of course, we may change the policy in any way we want and you automatically agree with it by continuing using the service”.

In the past, they used language that included very specific limits on how the data could be used. Now, they make no promises and obfuscate the possibilities by providing ‘examples’ of ways that the data might be used.

If they were serious about privacy, the minimum would be to be transparent and specific about the data use. The lack of specificity makes it abundantly clear that they intend to use the data in ways that users would disapprove.