Errors in extension manifest

[Zlewness]

You have two errors that show up in about:debugging for Firefox.

Reading manifest: Warning processing version: version must be a version string consisting of at most 4 integers of at most 9 digits without leading zeros, and separated with dots

Reading manifest: Warning processing sandbox: An unexpected property was found in the WebExtension manifest.

I assume by putting the word 'resigned' into your version number, you've caused the first error. I don't know enough about manifests to diagnose the second error.