How to get contents of the address bar in OS X Firefox from another app?

Ivan M <[email protected]> Sat, 17 Oct 2015 20:16:12 -0700 (PDT)
Newsgroups gmane.comp.mozilla.accessibility
Message-ID <[email protected]>
My app relies on OS X accessibility to get current tab URLs from different browsers.

But Firefox on OS X doesn't use native UI, so I can't get to its address bar with OS X Accessibility framework. (Or at least Xcode Accessibility Inspector can't see it properly.)

Are there any possible ways to get it?