https://searchfox.org/mozilla-central/rev/911d1ebfb02cce4ff20f7ef965def04becfee710/browser/base/content/browser-places.js#2056 got used in the bookmarks tools submenu, but bug 1648613 removed that, so the code is now unused. It would be good to doublecheck the patch in bug 1648613 to check there aren't more helper methods that can now be removed.
Bug 1763262 Comment 0 Edit History
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https://searchfox.org/mozilla-central/rev/911d1ebfb02cce4ff20f7ef965def04becfee710/browser/base/content/browser-places.js#2056 got used in the bookmarks tools submenu, but bug 1689366 removed that, so the code is now unused. It would be good to doublecheck the patch in bug 1689366 to check there aren't more helper methods that can now be removed.