Talk about a clickbait title. Two hyper-technical features and support for an obscure image format.
To be honest, as a faithful Firefox user, I'm very hesitant to update my browser. A few months ago FF rolled out an abysmal UI update out of the blue, and I had to rely on third-party "fix" [0] to this problem. I really don't want to lose the "fix" due to update, the low contrast of default theme makes Firefox just unusable to me.
I wish there was a no-bullshit fork of Firefox with no Pocket, no Suggestions and Photon UI.