How to determine path to resources of Firefox WebExtension to get same value in chrome.extension.getUrl() for different users?
<p>Prior to use our extension users have to log in. We use external provider that requires some parameters. Redirection url is among of them. When user log in he will be redirected to the page that have to be in xpi file. So, we have to know exactlly what is the url of this page. This url has to be added to Whitelist and we have to make sure that this url is the same for all users.</p>

<p>I installed the beastify extension (<a href="https://github.com/mdn/webextensions-examples/tree/master/beastify" rel="nofollow">https://github.com/mdn/webextensions-examples/tree/master/beastify</a>) on different computers . After click on the same button I get the different paths to image:
moz-extension://1cb85296-3a66-42f5-85df-5caf7d388c56/beasts/frog.jpg for first and moz-extension://2e986e2d-1307-49ee-a4d4-f83e642ecf66/beasts/frog.jpg for second.</p>

<p>What I need to do for getting the same value in chrome.extension.getUrl() for different users in Firefox WebExtension?</p>

<p>UPD:
It is possible in Chrome after setting "key" in manifest.json (but this way is not working in Firefox). Then chrome.extension.getUrl() , chrome.runtime.id, chrome.extension.id will be return the one value for different users/installs/devices
I need the same behavior in Firefox</p>

<p>UPD2: <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1271663" rel="nofollow">https://bugzilla.mozilla.org/show_bug.cgi?id=1271663</a></p>