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.pdfLinkService.setHash(storedHash);
    }
    
    
    this.toolbar.setPageNumber(
      this.pdfViewer.currentPageNumber,
      this.pdfViewer.currentPageLabel
    );
    this.secondaryToolbar.setPageNumber(this.pdfViewer.currentPageNumber);
    if (!this.pdfViewer.currentScaleValue) {
      
      
      this.pdfViewer.currentScaleValue = DEFAULT_SCALE_VALUE;
    }
  },
  /**
   * @private
   */
  _cleanup() {
    if (!this.pdfDocument) {
      return; 
    }
    this.pdfViewer.cleanup();
    this.pdfThumbnailViewer.cleanup();
    
    this.pdfDocument.cleanup(
       this.pdfViewer.renderer === RendererType.SVG
    );
  },
  forceRendering() {