Out of curiosity, why use Edge over Firefox?
* Offscreen canvas. E.g. samples from here do not work for me https://developers.google.com/web/updates/2018/08/offscreen-...
* There are two problems with development:
1. Firefox does not catch some exceptions. This problem is fixed in 67 version so I can wait (but I still need to wait).
2. Firefox crashes for me randomly sometimes when I restart React dev server.* Samples in the link I have given are still not working even if you enable gfx.offscreencanvas.enabled. Therefore I conclude that this is not working at all.
* As well this is good option for development but Firefox 44 was released in 2016. I think it is safe to assume that Firefox will never release this or at least will not release in acceptable time frame. Most probably we will see messages like this soon "We see you use Firefox. This feature is supported on Chrome, Chromium or Edge browsers. We recommend using one of them if you need this.".