How to grab UUID from Firefox/Chrome add-on/extenstion

I am trying to grab the uuid that is assigned to each extenstion/add-on installation. This is not the extension ID that is that same across all extension installations. This is the one that is unique for each user per install.

Solution

you can call browser.runtime.getURL('/'); this will return you a url string like moz-extension://9a08sd798-af1b-4572-95ab-9d6866517ade/ then you can parse the string from that or if you need it to open a tab to your popup just put the url to your popup.

let url = browser.runtime.getURL('/dist/frontend/index.html');
browser.tabs.create({
  url
})