chrome 72 にするとpixivの画像ダウンロードが失敗する

[ginzu]

onBeforeSendHeadersのオプションにextraHeadersを追加すれば動きますが、推奨されていない行為となります。

以下ドキュメントより抜粋。

https://developer.chrome.com/extensions/webRequest

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Starting from Chrome 72, the following request headers are not provided and cannot be modified or removed without specifying 'extraHeaders' in opt_extraInfoSpec:

• Accept-Language
• Accept-Encoding
• Referer
• Cookie

Starting from Chrome 72, the Set-Cookie response header is not provided and cannot be modified or removed without specifying 'extraHeaders' in opt_extraInfoSpec.

Note: Specifying 'extraHeaders' in opt_extraInfoSpec may have a negative impact on performance, hence it should only be used when really necessary.