I was wondering if WebGL is considered stable enough to be enabled by default. It makes some PDFs render much faster and it has been off by default for a while now, so we have had quite some time to test it.

If we decide to enable WebGL by default, we should not forget to update https://github.com/mozilla/pdf.js/blob/master/extensions/chromium/preferences_schema.json#L39 as well.

/cc @yurydelendik 
/cc @Snuffleupagus (because IIRC you were testing WebGL too)

kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
  },
  useOnlyCssZoom: {
    
    value: false,
    kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
  },
  viewerCssTheme: {
    
    value: 0,
    kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
  },
  viewOnLoad: {
    
    value: 0,
    kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
  },
  cMapPacked: {
    
    value: true,
    kind: OptionKind.API,
  },
  cMapUrl: {
    
    value:
      typeof PDFJSDev === "undefined" || !PDFJSDev.test("PRODUCTION")
        ? "../external/bcmaps/"
        : "../web/cmaps/",
    kind: OptionKind.API,
  },