[=tegleg;222493]
just built from the today to check out HTML5 
editor launch button: HTML5 - No Devices Found
package from editor menu
Missing UE4Game binary.
You may have to build the UE4 project with your IDE. Alternatively, build using UnrealBuildTool with the commandline:
UE4Game <Platform> <Configuration>
edit:
adding code to a pure blueprint project allows it to be packaged from the menu
other edit:
i get between 1 and 5 fps, slightly disappointing
http://teglegrecords.free.fr/ue4/html5test.html
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I get about 30 fps on my work laptop.
And capped at 60 fps on my regular computer.
Both on Opera (which is more or less chrome now)