Modernize the code in the `test/downloadutils.mjs` file#17431

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timvandermeij merged 3 commits intomozilla:masterfrom

timvandermeij:modernize-test

Dec 17, 2023

Commits on Dec 17, 2023

Modernize the `downloadFile` test helper function
timvandermeij
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Modernize the `downloadManifestFiles`/`ensurePDFsDownloaded` test helper functions
timvandermeij
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Modernize the `rewriteWebArchiveUrl` test helper function
timvandermeij
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