There are lots of great web browsers now, which is a huge improvement on the state of the world when Firefox 1.0 was released. All major browsers today do shar

There are lots of great web browsers now, which is a huge improvement on the state of the world when Firefox 1.0 was released. All major browsers today do share a huge problem - the web browser needs to be fast (performance and responsiveness are a Really Big Deal to people), and it also needs to be secure (people getting ransomware via the browser is Not OK with them). Privacy is a more nebulous topic, I agree. One place where Mozilla has invested that can make a real difference there is with Rust and Servo. A lot of the investments in Firefox that Mozilla makes are intended to help the web as a whole. Trying to standardize and expand on cross-browser extensions with WebExtensions is an example of this. Coming back to the topic, while I agree that most people don't care about privacy online but there are some who do and Tor users almost certainly do. Bringing Tor's security and privacy improvements to Firefox is good for everyone, and some improvements help both performance/responsiveness and security (the recently-released and ongoing work from Mozilla on multiprocess and sandboxing is an example of this.)