[tbb-dev] Updating TB and Orfox for Meltdown and Spectre?

Not sure if there is an open ticket I should be monitoring, or a meeting I missed, but just saw the Firefox update to address Meltdown and Spectre: https://www.mozilla.org/en-US/firefox/57.0.4/releasenotes/

Are Tor Browser and Orfox vulnerable these attacks? Has this been covered somewhere else?

Thanks, and just figuring out if my week ahead is going to be spent on an urgent Orfox release or not!

+n