I realize I'm about to post something that sounds like the most generic HN slop comments... but, considering it's why Mozilla initially made a whole new language in the first place, I hope most can look past what fanatics would normally say and focus on the scenario:

I was ecstatic about Ladybird from a "fun NIH project" perspective but once it became "serious" and had a cross-platform daily-driver long term focus it was quite the let down that the hot new independent kickstart was... still going to be built on C++ anyways. Even the Serenity ecosystem had started work on a NIH memory safe language - Jakt! I'm not going to say the "R" word (mostly because I'm less interested "which" and more interested in the "what") but the one place I'd really like to see memory safety is the new fresh-engined web browser written by a small team (or really, any team).

On that front https://servo.org/ is "alive" again under the Linux Foundation. It has a focus on being an easily embeddable engine and it seems to be picking up a bit of steam. Whether or not it really takes off remains to be seen. I'll be watching closely though!