Fail to download files above ~15MB [Firefox]

[Rockouunderscore]

Describe the bug A clear and concise description of what the bug is. Failure to download files above ~15MB on firefox when "Allow extension takes over downloads" is enabled ( Unsure of the exact maximum size )

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Expected behavior A clear and concise description of what you expected to happen. The file would download like normally.

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Example work from Pixiv If applicable, add work url to help me to reproduce the problem. https://www.pixiv.net/en/artworks/87269819

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Screenshots If applicable, add screenshots to help explain your problem.

https://user-images.githubusercontent.com/82128803/162601255-091da95a-a484-4721-a8eb-398e8cfe4328.mp4

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Browser and Version (please complete the following information):

• e.g. chrome, edge，firefox

Firefox 99.0b8 (64-bit) ( It is the developer edition of Firefox ) ( Tested normal Firefox and it behaves the same [99.0] ) It seems to work fine on chromium

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Settings of extension You can export the settings of extension in setting page. pixiv_toolkit_settings-1649563914617.zip

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Additional context Add any other context about the problem here. When downloading is finished it shows this error in the console Error: An unexpected error occurred undefined and fails to download