ZDnet: The bug within OS X 10.7 Lion causes Firefox to crash if it is using downloadable fonts. Mozilla "alerted Apple to the problem before the release of 10.7, but they did not fix the problem before 10.7 went to final release", the company wrote in a blog on Friday.
It's 2022, every browser should have this.
Web browsers collect a massive amount of our web history data. These options can help with that.
A major source of revenue for Mozilla.