How to get the same id as the web store hosted extension when packaging it in local?

I have a extensi开发者_如何学运维on hosted on chrome web store, and I host it on my own server too.

But they can't have the same id, so users can install both of them.

So, when I pakage my extension, how can I get a id that is same with the extension hosted on chrome web store.

---

Why not just download CRX file from the Gallery and upload it to your server? I see no need in repackaging it manually.

---

The webstore usually signs with its own key, which will result in a different extension ID than your hosted version, but there's an undocumented way of telling the webstore to sign with your own key. See this thread: https://groups.google.com/forum/#!topic/chromium-extensions/3vvygtEajMQ