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)

textLayerDiv,
    pageIndex,
    viewport,
    enhanceTextSelection = false,
    eventBus
  ) {
    return new TextLayerBuilder({
      textLayerDiv,
      eventBus,
      pageIndex,
      viewport,
      findController: this.isInPresentationMode ? null : this.findController,
      enhanceTextSelection: this.isInPresentationMode
        ? false