Did you try using dev/canary Edge? It should pretty much be the same rendering engine and JS engine as Chrome. Definitely report this to the Edge team if you have the time (very easy to do from the dev version of Edge). In my experience, they are very responsive to bug reports and feature suggestions.

Back in the day i made it work on Edge on an xbox. This was microsofts browser +JS engine. Nowadays its just chrome though. If it has problems, i'd be highly surprised.

Another possibility is code that acts differently depending on user-agent.

It most definitely does not.

Edge or Edgium?

For me, it's not very fast in chrome.

You might be getting the software rendering webgl implementation if there are GPU driver problems (https://blog.chromium.org/2016/06/universal-rendering-with-s...).

(Of course in principle you don't need hardware acceleration to make this kind of thing run fast...)

Can you give a bit more flavor to "not very fast"? I'm on a measly chromebook and scrolling, selecting text, expanding directories, everything is smooth and high framerate.

Is there a specific operation that is not fast? Opening it for the first time took a few seconds but afterwards it was pretty buttery.

Makepad kinda has a minimum GPU spec. It's aging-out for the people who don't have this, but some people still don't have gpu's that can bitblit their screen with a solid color.

I tried for it not to be, however there is no technically specific reason no.