I don't know my way around Firefox's source control at all, but I tried to do some digging. My first thought was to look through the changelogs on recent releas

I don't know my way around Firefox's source control at all, but I tried to do some digging. My first thought was to look through the changelogs on recent release tags, but there's no mention of the CVE that I can find in any of them. I did find these changes in 72 which look related to the bug: https://hg.mozilla.org/releases/mozilla-release/rev/8260da04c9b13f7c0e9cc6984a75e689b5fcb8c8 https://hg.mozilla.org/releases/mozilla-release/rev/8260da04... And poking at one of those referenced files in the beta channel looks like it has the same changes: https://hg.mozilla.org/releases/mozilla-beta/file/tip/js/src/jit/MIR.h https://hg.mozilla.org/releases/mozilla-beta/file/tip/js/src... So I think we're good on beta channel?