DOMjudge testcases broken in Firefox since Manifest V3

[ItsNiklas]

In the release version of the extension/on master, the DOMjudge contest parser is unable to extract the testcases (from zip).

Here's what I found out.

• The error is Error: Can't read the data of 'the loaded zip file'. Is it in a supported JavaScript type (String, Blob, ArrayBuffer, etc) ? from JSZip trying to read the ArrayBuffer. https://github.com/jmerle/competitive-companion/blob/68dcedf14692b8750f74ad367153549dbe3a2568/src/parsers/contest/DOMjudgeContestParser.ts#L79-L81
• The actual contents of the ArrayBuffer seem to be fine, as when converted to a string, some correct strings can be identified in the compressed artefact... The length also varies from problem to problem.
• git-bisect revealed 0908810 as the first bad commit.
• The issue only occurs only in Firefox, not in dev:chrome.

This is quite intriguing, but I don't know enough about web extensions to solve it myself.

[jmerle]

Weird issue, but fixed in 0f96a0cb2d661d87737e5c99e2ec44888d75285a. I have no clue what's going on, but this appears to be the same issue as https://github.com/Stuk/jszip/issues/759, and the workaround for that issue posted in https://github.com/Stuk/jszip/issues/759#issuecomment-932896399 also works here.