Attach (recommended) or Link to PDF file here:
https://guichet.public.lu/dam-assets/catalogue-formulaires/tva/tva-option-aic-pers-morales/tva-option-aic-pers-morale-DE.pdf

Configuration:
- Web browser and its version: Firefox Nightly 91.0a1 (2021-06-26) (64-bit)
- Operating system and its version: Windows 10.0.19043.1052
- PDF.js version: N/A

Steps to reproduce the problem:
1. enableXFA in Firefox Nightly
2. Open form

What is the expected behavior? (add screenshot)
Header image is scaled properly
![image](https://user-images.githubusercontent.com/7104454/123525954-905d1f00-d6a2-11eb-840e-be30eee395e1.png)

What went wrong? (add screenshot)
Image is scaled to fit
![image](https://user-images.githubusercontent.com/7104454/123525957-96530000-d6a2-11eb-9991-bf7f37c6f1a5.png)


)
          .forEach(lines => {
            html.children.push({
              name: "p",
              children: lines,
            });
          });
      } else if (/[\u2028\n]/.test(this[$content])) {
        html.name = "div";
        html.children = [];
        
        
        this[$content].split(/[\u2028\n]/).forEach(line => {
          html.children.push(
            {
              name: "span",
              value: line,
            },
            {
              name: "br",
            }
          );
        });
      }
      return HTMLResult.success(html);
    }
    return this[$content][$toHTML](availableSpace);
  }
}
class TextEdit extends XFAObject {