Noticed this while debugging bug 1294456: http://searchfox.org/mozilla-central/rev/44f6964ba95b8ddd8ebf70c55b34cd2323afeef4/testing/marionette/browser.js#191 this.browser refers to either gBrowser in the Desktop case, or BrowserApp in the Fennec case. Neither of these things has a selectedIndex property available on them, so this is always returning undefined. I suspect this is not intended.
This has been fixed through other bugs as this file no longer works like that. Closing.
Status: NEW → RESOLVED
Last Resolved: a year ago
Resolution: --- → INCOMPLETE
This has been fixed as part of bug 1323185 for Firefox 54.
Assignee: nobody → hskupin
Depends on: 1323185
Resolution: INCOMPLETE → FIXED
Target Milestone: --- → mozilla54
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