Firefox's built-in privacy features are meaningless as long as it has single-digit marketshare and the user-agent itself sticks out like a sore thumb. Furtherm

Firefox's built-in privacy features are meaningless as long as it has single-digit marketshare and the user-agent itself sticks out like a sore thumb. Furthermore, the only real way to make a difference by actually blocking malicious domains and resources - uBlock Origin - still isn't bundled by default despite being permissively licensed and Firefox having a way to install extensions at first run (that's how Pocket is distributed - it's not built into the browser, instead it's an extension automatically downloaded on first run).