A) The data that flows through my browser is private to me, and I have no assurances that Firefox will respect it. The tools I use for work have a license that

A) The data that flows through my browser is private to me, and I have no assurances that Firefox will respect it. The tools I use for work have a license that openly respects IP (without which they wouldn't be in business) and I'm am comfortable that their business model relies more on keeping me as a customer than selling the (limited) IP that flows through their tools. B) The tools I use are force multipliers for me, that differentiate from their competition through the improvements they make (thus making me far more productive than I otherwise would be). I use Firefox, but there isn't a huge amount to distinguish it from other browsers, and it's not clear to me that improvements in browsers over the last 10 years (beyond security) have added enough value to my life to need my data. C) For the tools I'm using, I am one of a relatively small number (tens of thousands) of users, I am occasionally in direct contact with their staff (again, I pay for this support, among other things); my contribution of telemetry data to them is making a substantial contribution. For Firefox, with its install base in the hundreds of millions, my individual contribution is meaningless.