Attach (recommended) or Link to PDF file here: [A3_Quer.pdf](https://github.com/mozilla/pdf.js/files/7373152/A3_Quer.pdf)


**Configuration:**

- Web browser and its version: Firefox 93.0
- Operating system and its version: macOS 11.6
- PDF.js version: 2.5.207
- Is a browser extension: no

**Steps to reproduce the problem:**
1. Open the attached file in Firefox

We discovered this issue in on older version of this library, but it can be reproduced in the current version of Firefox.

**What is the expected behavior? (add screenshot)**
The file should be rendered with a linear gradient as a background:
![Bildschirmfoto 2021-10-19 um 14 34 00](https://user-images.githubusercontent.com/8649002/137910027-07947e34-700b-4692-b225-d38c36da0d37.png)


**What went wrong? (add screenshot)**
The file is rendered without any background:
![Bildschirmfoto 2021-10-19 um 14 35 05](https://user-images.githubusercontent.com/8649002/137910215-a6b8fb9e-ff95-49f0-93b4-c9f127bd49c1.png)



**Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):**
none
const coordsArr = this.coordsArr;
    const shadingType = this.shadingType;
    let type, p0, p1, r0, r1;
    if (shadingType === ShadingType.AXIAL) {
      p0 = [coordsArr[0], coordsArr[1]];
      p1 = [coordsArr[2], coordsArr[3]];
      r0 = null;
      r1 = null;
      type = "axial";
    } else if (shadingType === ShadingType.RADIAL) {
      p0 = [coordsArr[0], coordsArr[1]];
      p1 = [coordsArr[3], coordsArr[4]];
      r0 = coordsArr[2];
      r1 = coordsArr[5];
      type = "radial";
    } else {
      unreachable(`getPattern type unknown: ${shadingType}`);
    }
    return ["RadialAxial", type, this.bbox, this.colorStops, p0, p1, r0, r1];
  }
}
class MeshStreamReader {