There's nothing to coordinate with on this cve. There's almost assuredly coordination happening between the various security orgs, but this cve is about a chrom

There's nothing to coordinate with on this cve. There's almost assuredly coordination happening between the various security orgs, but this cve is about a chrome bug, and the Google teams weren't able to isolate ff or safari zero days to report. "We expect this group has zero days that they're exploiting in your software but we don't know what specifically they are" isn't a cve.