HTTP/2 server push makes our sites considerably faster on first view. However, Firefox seems to have disabled server push since ca. v56.
Over at webpagetest.org, Patrick Meenan suggested that the developers had turned this off temporarily. Searching the web, I could not find any confirmation or info on this. But almost half a year later, our sites still load considerably slower in Firefox than in e.g. Chrome and this is clearly due to Firefox not accepting server push.
Does anyone know if and when server push will come back to Firefox?