keyboard performance

Ive been writing a webgl game, its crappy, but, Ive been stuck with an issue.. I have boiled my issue with my game down to 1 thing. Keyboard input. (while not ECS related as I tried it and had more issues, it is relevant see later) For example,

If i had an axis defined in input

Code (CSharp):

1. float x= Input.GetAxis("Horizontal") * tim* 150.0f;

then basically movement barely happens under chrome and firefox, semi almost usable in edge.
However, if I change it to specifically

Code (CSharp):

1.         if (Input.GetKey(KeyCode.D)) x =  tim* 150.0f;      
2.        if (Input.GetKey(KeyCode.A)) x =  -tim* 150.0f;

then movement happens in an almost usable manner on chrome and firefox when it wasnt before.
Odd I thought.

This morning I was playing with the new unity tiny project - , but guess what didnt work? Movement.. In firefox, I tried out the example galaxyraiders - eg a classic space invaiders, only my player wouldnt move, it only moves in edge.. Exactly like what I see in my own game.

I feel slightly frustrated in that somehow, I feel encouraged to make small web based games, but that the work between unity/webgl/browsers is lacking, if I play the demos in anything other than edge, Im wasting my time.. and people just dont like edge.

What on earth am I missing?