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Mozilla is already revising its new Firefox terms to clarify how it handles user data
(www.theverge.com)
This is a most excellent place for technology news and articles.
Louis Rossmann had a good video about this. Basically, California passed a law that changed what "selling your data" means, and it goes way beyond what I consider "selling your data." There's an argument here than Mozilla is largely just trying to comply with the law. Whether that's accurate remains to be seen though.
Then how about putting that in the language? "We don't sell your data, except if you're in California, because they consider x, y and z things we might actually do as selling data."