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)


return rasterizeXfaLayer(
                        annotationLayerContext,
                        viewport,
                        xfa,
                        task.fontRules
                      );
                    });
                  }
                } else {
                  annotationLayerCanvas = null;
                  initPromise = Promise.resolve();
                }
              }
              var renderContext = {
                canvasContext: ctx,
                viewport,
                renderInteractiveForms: renderForms,
                optionalContentConfigPromise: task.optionalContentConfigPromise,
              };
              if (renderPrint) {
                if (task.annotationStorage) {
                  const entries = Object.entries(task.annotationStorage),
                    docAnnotationStorage = task.pdfDoc.annotationStorage;
                  for (const [key, value] of entries) {
                    docAnnotationStorage.setValue(key, value);
                  }
                  renderContext.includeAnnotationStorage = true;
                }
                renderContext.intent = "print";
              }