I recently fixed a Firefox bug to allow easier tab management in FF extensions. My hope is that extensions like Tree Style Tab or Sidebery benefit from my improvements. I love them!

Title: Updated openerTabId is not notified via tabs.onUpdated if it is changed by tabs.update()

https://bugzilla.mozilla.org/show_bug.cgi?id=1409262

https://phabricator.services.mozilla.com/D164982#7511767