This is correct, and along side the Rust development, they also started work on a web renderer, in Rust, called Servo that at one point was considered as a possible future replacement for the Gecko engine. Around the time Rust transitioned to the Rust foundation, Servo was also pretty much abandoned by Mozilla, moved to the Linux Foundation in 2020 and then Linux Foundation Europe in 2023 where it is finally getting some steady development again. There is also some recent progress on building a browser based on Servo, although it will probably be some time before it’s ready for daily use.
A high-coke rail off a hand rail on high-speed rail.