ESR115: check websocket over HTTP2 is isolated (FPI)
FF110+ 1774572 enabled websockets over HTTP2
there's actually a pref; currently locked false in TB alpha
pref("network.http.http2.websockets", true)
We actually got websockets FPI'd in FF92 and backported to ESR just for TB in 1721858. Close if we plan to keep the pref locked
@tornetworkperson