Critics said the new terms implied Mozilla was asking users for the rights to whatever data they input or upload through Firefox.
The problem isn’t what the TOU says, it’s the fact that there’s a TOU at all. The browser isn’t a service that needs terms, it’s an application that shouldn’t have any.
Mozilla, please. The wording of things in the terms of use document is not the main problem. The exact legal interpretations given to them does not make much difference. That you suddenly feel the need to impose on your remaining users a “terms of use” agreement at the same time as you stop promising not to sell user data is not conducive to retaining your credibility.
The article points out that the legal definition of what a sale is didn’t match how they were using it. They didn’t stop promising to not sell user data.
They literally removed the entire section “Does Firefox sell my data?” which started with “Nope, never have, never will!”