The test file at https://github.com/mozilla/pdf.js/blob/master/test/pdfs/annotation-choice-widget.pdf contains listboxes, which are not rendered correctly when printed right now. These kinds of fields are made by https://github.com/mozilla/pdf.js/blob/master/src/display/annotation_layer.js#L672-L678.

/cc @calixteman 
if (!this._isChoice) {
      throw new Error("Not a choice widget");
    }
    if (nIdx < 0 || nIdx >= this.numItems) {
      nIdx = this.numItems - 1;
    }
    const item = this._items[nIdx];
    return bExportValue ? item.exportValue : item.displayValue;
  }
  getArray() {
    if (this._kidIds) {
      return this._kidIds.map(id => this._appObjects[id].wrapped);
    }
    if (this._children === null) {
      this._children = this._document.obj._getChildren(this._fieldPath);
    }
    return this._children;
  }
  getLock() {
    return undefined;
  }
  isBoxChecked(nWidget) {
    return false;
  }
  isDefaultChecked(nWidget) {
    return false;
  }
  insertItemAt(cName, cExport = undefined, nIdx = 0) {