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)

argsArray: [],
        lastChunk: false,
      };
      if (this._stats) {
        this._stats.time("Page Request");
      }
      this._pumpOperatorList({
        pageIndex: this._pageIndex,
        intent: renderingIntent,
        renderInteractiveForms: renderInteractiveForms === true,
        annotationStorage,
      });
    }
    const complete = error => {
      intentState.renderTasks.delete(internalRenderTask);
      
      
      if (this.cleanupAfterRender || renderingIntent === "print") {
        this.pendingCleanup = true;
      }
      this._tryCleanup();
      if (error) {
        internalRenderTask.capability.reject(error);
        this._abortOperatorList({
          intentState,
          reason: error,
        });
      } else {
        internalRenderTask.capability.resolve();
      }