I like Mozilla. No, I love them. Hopefully I can attend the MozFest this year again. This talk was about some tech that is and was developed by the Mozilla Emmerging Technology Group.
Short summary (together with some other related things):
Rust (programming language) is now used in parts of Firefox and in
Servo, a new browser engine built from scratch, from which parts were already imported into Firefox (mostly since Firefox 57)
Note to myself: I definitely should look into Machine Learning at some point; and Rust