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)

isDataScheme,
  loadScript,
  PageViewport,
  RenderingCancelledException,
  StatTimer,
} from "./display_utils.js";
import { FontFaceObject, FontLoader } from "./font_loader.js";
import { NodeCanvasFactory, NodeCMapReaderFactory } from "./node_utils.js";
import { AnnotationStorage } from "./annotation_storage.js";
import { apiCompatibilityParams } from "./api_compatibility.js";
import { CanvasGraphics } from "./canvas.js";
import { GlobalWorkerOptions } from "./worker_options.js";
import { isNodeJS } from "../shared/is_node.js";
import { MessageHandler } from "../shared/message_handler.js";
import { Metadata } from "./metadata.js";
import { OptionalContentConfig } from "./optional_content_config.js";
import { PDFDataTransportStream } from "./transport_stream.js";
import { WebGLContext } from "./webgl.js";
const DEFAULT_RANGE_CHUNK_SIZE = 65536; 
const RENDERING_CANCELLED_TIMEOUT = 100; 
const DefaultCanvasFactory =
  (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) && isNodeJS
    ? NodeCanvasFactory
    : DOMCanvasFactory;
const DefaultCMapReaderFactory =
  (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) && isNodeJS
    ? NodeCMapReaderFactory
    : DOMCMapReaderFactory;
/**
 * @typedef {function} IPDFStreamFactory