Using firefox developer edition, aurora update channel, 60.0b2 (64-bit), macOS 10.13.3. The functionality of the bookmarks sidebar has changed recently: command-clicking folders in the side bar used to be a shortcut to "open all in tabs" for that folder. Now command-clicking selects that folder for multiple selection. Additionally the new behaviour is inconsistent with command-clicking a leaf node, which opens that specific bookmark in a new tab.

The old behaviour was incredibly useful for having categories of folders to open while still being able to select specific bookmarks. I think the new behaviour would be much better for this use case if you could multiple select a combination of folders and bookmarks, and additionally if after multiple selection there was an option for "open all in tabs". Currently having multiple folders selected does not have this option. Was the change intended? Is the only alternative (outside of enabling bookmarks toolbar) individually clicking bookmarks?