This is a meta bug for hiding tabs and hiding the tab strip and all related features.
Shell, you set the relnote-firefox request flag, do you mean that you want this feature mentionned in Firefox Release notes (ex: https://www.mozilla.org/en-US/firefox/59.0/releasenotes/) or that you want it mentionned in the notes targetting web developers linked from the release notes on MDN (https://developer.mozilla.org/fr/Firefox/Versions/59)? If the former, you have instructions on the release notes process here: https://wiki.mozilla.org/Release_Management/Release_Notes#How_to_nominate_a_bug_for_release_notes_addition.3F If the later, then you should set the dev-doc-needed keyword on the bug and indicate which final release it should target. Thanks!
This is targeting Fx61. We'll want to relnote this once it's officially deemed a go to ship (currently at risk in Trello).
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