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.eventBus.dispatch("localized", { source: this });
    });
    this._initializedCapability.resolve();
  },
  /**
   * @private
   */
  async _readPreferences() {
    if (
      (typeof PDFJSDev === "undefined" ||
        PDFJSDev.test("!PRODUCTION || GENERIC")) &&
      AppOptions.get("disablePreferences")
    ) {
      
      
      return;
    }
    try {
      AppOptions.setAll(await this.preferences.getAll());
    } catch (reason) {
      console.error(`_readPreferences: "${reason?.message}".`);
    }
  },
  /**
   * Potentially parse special debugging flags in the hash section of the URL.
   * @private
   */
  async _parseHashParameters() {