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)

return this._currentPageNumber;
  }
  /**
   * @param {number} val - The page number.
   */
  set currentPageNumber(val) {
    if (!Number.isInteger(val)) {
      throw new Error("Invalid page number.");
    }
    if (!this.pdfDocument) {
      return;
    }
    
    if (!this._setCurrentPageNumber(val,  true)) {
      console.error(
        `${this._name}.currentPageNumber: "${val}" is not a valid page.`
      );
    }
  }
  /**
   * @returns {boolean} Whether the pageNumber is valid (within bounds).
   * @private
   */
  _setCurrentPageNumber(val, resetCurrentPageView = false) {