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)

}
      this.scrollPageIntoView({
        pageNumber: page,
        destArray: dest,
        allowNegativeOffset: true,
      });
    }
    this.eventBus.dispatch("scalechanging", {
      source: this,
      scale: newScale,
      presetValue: preset ? newValue : undefined,
    });
    if (this.defaultRenderingQueue) {
      this.update();
    }
  }
  /**
   * @private
   */
  get _pageWidthScaleFactor() {
    if (
      this._spreadMode !== SpreadMode.NONE &&
      this._scrollMode !== ScrollMode.HORIZONTAL &&
      !this.isInPresentationMode
    ) {
      return 2;
    }
    return 1;
  }
  _setScale(value, noScroll = false) {