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)


setMinMaxDimensions,
  toStyle,
} from "./html_utils.js";
import {
  getBBox,
  getColor,
  getFloat,
  getInteger,
  getKeyword,
  getMeasurement,
  getRatio,
  getRelevant,
  getStringOption,
  HTMLResult,
} from "./utils.js";
import { stringToBytes, Util, warn } from "../../shared/util.js";
import { searchNode } from "./som.js";
const TEMPLATE_NS_ID = NamespaceIds.template.id;
const SVG_NS = "http://www.w3.org/2000/svg";
const MAX_ATTEMPTS_FOR_LRTB_LAYOUT = 2;
const MAX_EMPTY_PAGES = 3;
function _setValue(templateNode, value) {
  if (!templateNode.value) {
    const nodeValue = new Value({});
    templateNode[$appendChild](nodeValue);
    templateNode.value = nodeValue;
  }
  templateNode.value[$setValue](value);
}
function* getContainedChildren(node) {