Yes. bookmark animation and page action is major update of photon.
It's really sad that both are gone. - https://dolske.wordpress.com/2017/08/01/photon-engineering-n... - https://dolske.wordpress.com/2017/08/04/photon-engineering-n...
It's really sad that both are gone. - https://dolske.wordpress.com/2017/08/01/photon-engineering-n... - https://dolske.wordpress.com/2017/08/04/photon-engineering-n...
https://www.mozilla.org/en-US/firefox/75.0/releasenotes/