They add this line earlier in the code:
Firefox is independent and a part of the not-for-profit Mozilla, which fights for your online rights, keeps corporate powers in check and makes the internet accessible to everyone, everywhere. We believe the internet is for people, not profit. Unlike other companies, we don’t sell access to your data. You’re in control over who sees your search and browsing history. All that and exceptional performance too.
Seriously, do better and stop needlessly shaming Mozilla.
[edit] Read the replies to my message. There is good insight. Im probably very wrong here. Leaving my comment intact for context.