Off-topic*: Can I even visit untrusted websites anymore? Firefox's security is probably far worse than Chrome's, and escaping the browser sandbox now seems accessible to way too many people.
* Kind of on-topic given the last sentence of the article...
This exploit is mitigated by disabling JIT, which you can do in edge. Chrome only has a "disable v8 optimizations", which doesn't entirely disable JIT, but might still mitigate this bug. Not sure about all the other chrome forks.