Anything you say or do in Firefox may be used by Mozilla against you. You have the right to use a different browser. If you cannot find a browser that doesn’t fuck you over one way or another, one will not be provided for you because capitalism is working exactly as designed.
https://blog.mozilla.org/en/products/firefox/firefox-terms-of-use/
@aral
Does that mean, if i type something into a mask on an encrypted website (https), that Mozilla can read it?
At least they’re open source so you should be able to see exactly what information is being collected if you dive into the code.