Image preloading doesn't work on Firefox

[crisalis2]

Momentary flashes keep happening in Firefox. I tried with a fresh profile too. In Edge there's no problem. I'm using local files but I served them to myself via HTTP, same problem.

[crisalis2]

I found that the only way to preload images with Firefox was to use decode() (link below). I tested decode() succesfully with other browsers too, but I read somewhere that, except for Firefox, it wasn't an optimal solution. In any case, the preload problem seems to be Firefox's rather than mokuro's, so I will close this.

https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement/decode