thanks for checking into this and comparing. I have the text and buttons on different layers. Maybe if i reduce the number of layers it could help. That is something I could try.
I made this entirely in Construct 3. So I guess Construct is the guy who has CSS3 issues.. I just put things on a given layer and make sure they look right in the editor. I'm not doing anything special. Also this has nothing to do with the WebGL effects thankfully.
If you run this on a weaker computer with little/no GPU I have a rule setup that disabled the shader effects to save on FPS because the shaders kill weaker computer.
Also I guess I could try loading Construct in Firefox and see how things look in there. I always develop in Chrome.