When the pick mode is enabled, the toolbox keeps the focus, which blocks the key bindings associated with the pick mode (like e.g. Enter to select the currently hovered element) not to work. Related comment by Patrick in bug 1173504 comment 27: "About focus: right now, when you engage the pick mode, the toolbox keeps the focus. So none of the pick mode key bindings work by default. I can't remember if this was always like this or if it's a regression, but the fact is that pressing DELETE right after having clicked on the element picker wouldn't do anything anyway. You'd first have to focus the content (by, e.g., clicking in the URL bar and pressing TAB once)." Steps to reproduce the issue: 1. Open the Inspector on this page 2. Switch to the pick mode 3. Hover an element within the page 4. Press Enter => Nothing happens, while you'd expect the element to be selected within the node view. Sebastian

Also mentioned on discourse: https://discourse.mozilla-community.org/t/focus-browser-window-on-pick-element/12961