[FR] Shortcut for Back/Forward menu popup

[rubaboo]

Is your feature request related to a problem? Please describe.
I often want to jump a few steps back in history, and there is no way to do it without using the mouse...

Describe the solution you'd like
I want to be able to invoke the tab history menu using Alt+Down combo.

Describe alternatives you've considered
This code does what I want when I paste it into Console. I don't know how to bind it to a key using a user script.

var btnF = document.getElementById("forward-button");
btnF.menupopup.openPopup()

[aminomancer]

you can do it with fx-autoconfig's hotkeys API.

let details = {
  id: "myHotkey",
  modifiers: "alt",
  key: "ArrowDown",
  command: win => {
    let button = document.getElementById("back-button");
    if (button.disabled) {
      let fwdButton = document.getElementById("forward-button");
      if (!fwdButton.disabled) button = fwdButton;
    }
    win.gClickAndHoldListenersOnElement._openMenu(button);
  },
};

UC_API.Hotkeys.define(details).autoAttach({ suppressOriginalKey: true });