Attach (recommended) or Link to PDF file here:
See pdf in https://github.com/mozilla/pdf.js/issues/3109

Configuration:
- Web browser and its version: Firefox nightly
- Operating system and its version: Windows 10
- PDF.js version: builtin viewer

Steps to reproduce the problem:
1. Look at outlines

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/141514798-0e656865-1cbf-4fb8-a89b-530d36da23c9.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/141514740-c95e0237-8bf4-4129-a4a5-cb2ea5a3f4df.png)

"../../0021/002156/215675E.pdf#15"
      );
      expect(invalidDocBaseUrlAnnotations[0].url).toBeUndefined();
      expect(invalidDocBaseUrlAnnotations[0].unsafeUrl).toEqual(
        "../../0021/002156/215675E.pdf#15"
      );
      await Promise.all([
        defaultLoadingTask.destroy(),
        docBaseUrlLoadingTask.destroy(),
        invalidDocBaseUrlLoadingTask.destroy(),
      ]);
    });
    it("gets text content", async function () {
      const defaultPromise = page.getTextContent();
      const parametersPromise = page.getTextContent({
        normalizeWhitespace: true,
        disableCombineTextItems: true,
      });
      const data = await Promise.all([defaultPromise, parametersPromise]);
      expect(!!data[0].items).toEqual(true);
      expect(data[0].items.length).toEqual(11);
      expect(!!data[0].styles).toEqual(true);
      const page1 = mergeText(data[0].items);
      expect(page1).toEqual(`Table Of Content
Chapter 1 .......................................................... 2
Paragraph 1.1 ...................................................... 3
page 1 / 3`);
      expect(!!data[1].items).toEqual(true);
      expect(data[1].items.length).toEqual(6);
      expect(!!data[1].styles).toEqual(true);