Again something that used to work in Firefox.
FWIW: I use Tree Style Tabs (or Sideberry) to see why I arrived at a page. Not exactly the thing specified here but it works today.
Yeeep, I used it for a while: https://archive.is/ovRDX (addon no longer exists, it broke with Firefox Quantum)
Yeeep, I used it for a while: https://archive.is/ovRDX (addon no longer exists, it broke with Firefox Quantum)