Publish On open-vsx.org

I recently switched to using VSCodium, and found that I couldn't get the firefox debugger extension anymore. According to their [documentation](https://github.com/VSCodium/vscodium/blob/master/DOCS.md#extensions-marketplace), it uses a different store: https://open-vsx.org/

Can we get this extension be published there as well?

I should note, I did find a workaround by installing the `.vsix` downloaded from Microsoft's store, but still