>1. Privacy Firefox is the only major browser not built by a company that makes money from advertising and/or selling your personal data. Mozilla tracks and gives (sells?) unique information about every download to Google unless you choose to grab it from the FTP servers. https://www.ghacks.net/2022/03/17/each-firefox-download-has-...
https://www.mozilla.org/en-US/privacy/firefox/
The name "Google" appears multiple times, sometimes within the phrase "data to Google".
There are also currently references to "third-party ad platform" and "a third-party referral platform", along with other companies/organizations.
Some people will claim that it doesn't matter because some of this Firefox functionality that involves data collection and/or third-parties can be disabled, or that it's fine because it has been disclosed, or it's somehow acceptable because Firefox maybe doesn't send as much info as some of its competitors do, and so on.
I don't buy into those arguments. If Firefox was truly privacy-respecting, it would never collect nor send any data beyond that necessary to provide its core web browsing functionality.
Any functionality that might compromise a user's privacy should not be bundled by default, and would have to be explicitly opted into by manually installing an extension that provides such functionality. This would include Firefox's/Mozilla's own "telemetry".