How to get the link to the latest version of firefox addon?

I don't want to redirect user to firefox's store to install addon. I want to user be able to install addon immediately on my own site. I know for this I should create 'a' element with href to .xpi file. But how I can get the link to the latest version of .xpi file of the addon from the firefox store?

Solution

I've got it. The formula to get always the latest version of xpi file of addon:

addons.mozilla.org/firefox/downloads/latest/ADDON_NAME/addon-ADDON_ACCOUNT_ID-latest.xpi

Where ADDON_NAME - name of addon in store. You can get it from the url of the page of addon in FF. For example for this addon https://addons.mozilla.org/en-US/firefox/addon/givero/ the ADDON_NAME is givero.
Where ADDON_ACCOUNT_ID is id of owner account of addon. You can get it from link under the title of addon.

So for example for this addon https://addons.mozilla.org/en-US/firefox/addon/givero/ the link to the latest version of .xpi file will looks: https://addons.mozilla.org/firefox/downloads/latest/givero/addon-14479531-latest.xpi