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)

if (!intentState) {
      intentState = Object.create(null);
      this._intentStates.set(renderingIntent, intentState);
    }
    let opListTask;
    if (!intentState.opListReadCapability) {
      opListTask = Object.create(null);
      opListTask.operatorListChanged = operatorListChanged;
      intentState.opListReadCapability = createPromiseCapability();
      (intentState.renderTasks ||= new Set()).add(opListTask);
      intentState.operatorList = {
        fnArray: [],
        argsArray: [],
        lastChunk: false,
      };
      if (this._stats) {
        this._stats.time("Page Request");
      }
      this._pumpOperatorList({
        pageIndex: this._pageIndex,
        intent: renderingIntent,
      });
    }
    return intentState.opListReadCapability.promise;
  }
  /**
   * @param {getTextContentParameters} params - getTextContent parameters.
   * @returns {ReadableStream} Stream for reading text content chunks.
   */
  streamTextContent({