You'll end up with a "new tab" in between all the tabs every time you use "open all bookmarks" or middle-click the bookmark-folder.
When you click the "open all bookmarks" option when you right-click a bookmark-folder, can close the "new tab" in the browser, or be used as the first page of the list of bookmark-items (the preferred option), if the toolbar only shows on a "new tab".
I realize it might seem like a small thing, but I can't shake the feeling, it's expected behavior.
What do you guys think?
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