Step 8: Test with a real CRX file

You can obtain a Chrome extension (.crx file) by downloading one from the Chrome Web Store or by packaging your own extension in developer mode.

Step 9 (Optional): Enhance the parser

For a production-ready parser, consider these enhancements:

1. Add proper support for CRX3 format using a protocol buffer library
2. Implement ZIP extraction functionality
3. Add validation of the extension signature
4. Implement a streaming parser for handling large files

Conclusion

You've now created a basic CRX parser in WebAssembly using Rust that can:

• Parse the CRX header
• Extract metadata (version, public key, signature)
• Extract the ZIP content

This implementation provides a foundation that you can build upon for more advanced functionality.