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 (callback) {
      this._ensureObj(objId).capability.promise.then(callback);
      return null;
    }
    
    
    const obj = this._objs[objId];
    
    
    if (!obj || !obj.resolved) {
      throw new Error(`Requesting object that isn't resolved yet ${objId}.`);
    }
    return obj.data;
  }
  has(objId) {
    const obj = this._objs[objId];
    return obj?.resolved || false;
  }
  /**
   * Resolves the object `objId` with optional `data`.
   */
  resolve(objId, data) {