Local PDF files can not be opened correctly in MS Edge when change default charset.

[fz0000]

Steps:

1. Change default charset to UTF-8 (or any charset).
2. Check "Allow access to file URLs" in extension options.
3. Open a local PDF file (e.g. D:\file-sample_150kB.pdf)with MS Edge.

Expected:

The PDF file should opened correctly.

Actual:

corrupted content.

Additional info:

This issue does NOT occur on online PDF files. (e.g. visit https://file-examples-com.github.io/uploads/2017/10/file-sample_150kB.pdf)

Environment:

Win10 x64
MS Edge 92.0.902.84

[jinliming2]

Hi, this may not be fixed. Because I cannot assume the file type by file extension name.

It may be an HTML file with .pdf extension name.

Because a PDF file starts with ASCII characters: %PDF-, it's hard to tell it is a PDF file or a pure text file with some special encoding, unless I read more bytes and try to guess if it is a valid PDF file.

So, you may need to assume file type yourself.

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I am developing a new version to support "default charset for specified domain" (#24), so after then you can set to do not change the character set for the filename ending with .pdf.