Attach (recommended) or Link to PDF file here:
[output.pdf](https://github.com/mozilla/pdf.js/files/6374987/output.pdf)

Configuration:
- Web browser and its version: Firefox 88.0
- Operating system and its version: macOS Big Sur 11.2.3 (20D91)
- PDF.js version: 2.8.243
- Is a browser extension: no/Firefox built-in

Steps to reproduce the problem:
1.  add Ink-Annotations to a pdf (i use https://github.com/highkite/pdfAnnotate, Annotations with appearance streams are shown correctly)
2. open output file in firefox

What is the expected behavior? 
The annotations should be visible.
![Bildschirmfoto 2021-04-26 um 09 15 48](https://user-images.githubusercontent.com/33630884/116043809-6a020f80-a670-11eb-973c-6f2df3dae532.png)

What went wrong? 
The annotations are added to the dom but invisible.
![Bildschirmfoto 2021-04-26 um 09 18 26](https://user-images.githubusercontent.com/33630884/116043867-7e460c80-a670-11eb-964d-0cc2c6dbfb61.png)

Tested successfull with FoxitReader, AcrobatReader, Chrome and Safari.
data.actions = collectActions(
        params.xref,
        dict,
        AnnotationActionEventType
      );
    }
    const fieldValue = getInheritableProperty({
      dict,
      key: "V",
      getArray: true,
    });
    data.fieldValue = this._decodeFormValue(fieldValue);
    const defaultFieldValue = getInheritableProperty({
      dict,
      key: "DV",
      getArray: true,
    });
    data.defaultFieldValue = this._decodeFormValue(defaultFieldValue);
    data.alternativeText = stringToPDFString(dict.get("TU") || "");
    const defaultAppearance =
      getInheritableProperty({ dict, key: "DA" }) || params.acroForm.get("DA");
    this._defaultAppearance = isString(defaultAppearance)
      ? defaultAppearance
      : "";
    data.defaultAppearanceData = parseDefaultAppearance(
      this._defaultAppearance
    );
    const fieldType = getInheritableProperty({ dict, key: "FT" });
    data.fieldType = isName(fieldType) ? fieldType.name : null;
    const localResources = getInheritableProperty({ dict, key: "DR" });