How to programmatically update/remove extensions Options

Question

I am installing FF extensions using the information given here https://developer.mozilla.org/en/Installing%5Fextensions. I am extracting the xpi into a folder named after the extension's id. Fine with installation.

Now I have two issues,

1. Uninstalling.

   If I remove the extension id folder, FF is creating an empty folder when restarted.

2. Updating.

   If I replaced the extension id folder with new version of extension, the extension version is not showing in the 'tools->addon' dialog.

Can anyone help me here?

Regards,

Manoj Marathayil