[BUG] package does not contain a valid manifest

[zalewskigrzegorz]

What happened?

Run plasmo build --target=firefox-mv3 or plasmo build --target=firefox-mv2

pack extension according official documentation: https://extensionworkshop.com/documentation/publish/package-your-extension/

Firefox display error when trying to install Debugging unpacked extension works without problem

Version

Latest

What OS are you seeing the problem on?

Windows

What browsers are you seeing the problem on?

Firefox

Relevant log output

Error displayed in firefox when trying to install an extension
[ACTION FAILED] TEMPORARY_EXTENSION_INSTALL_FAILURE: File ...\build\firefox-mv2-prod.xpi does not contain a valid manifest error-logging.js:16:17
    errorLoggingMiddleware resource://devtools/client/aboutdebugging/src/middleware/error-logging.js:16
    debugTargetListenerMiddleware resource://devtools/client/aboutdebugging/src/middleware/debug-target-listener.js:107
    Redux 2
        thunk
        dispatch
    installTemporaryExtension resource://devtools/client/aboutdebugging/src/actions/debug-targets.js:143

(OPTIONAL) Contribution

• [ ] I would like to fix this BUG via a PR

Code of Conduct

• [X] I agree to follow this project's Code of Conduct
• [X] I checked the current issues for duplicate problems.

[sohail-amini]

open the extension's directory and select any file inside the extension instead of .zip folder