Bugzilla

STRs:
 1. Open https://jsfiddle.net/jib1/pz5pynyf/ as a second tab.
 2. Click "Allow" in the permission prompt if you get one.
 3. Refresh the page ↻ and then while the page is loading, in one swift motion, drag the tab heading downward and release to create a fresh window.
 
Expected result:
- Tab becomes a new window.

Actualt result:
- Tab pops back to where it was, and doesn't want to be dragged again. It also refuses to be dragged horizontally now.

Workaround:
- Clicking and dragging a different tab heading seems to snap it out of it.

STRs:
 1. Open https://jsfiddle.net/jib1/pz5pynyf/ as a second tab.
 2. Click "Allow" in the permission prompt if you get one (this primes the 60-minute permission grace period)
 3. Refresh the page ↻ and then while the page is loading, in one swift motion, drag the tab heading downward and release to create a fresh window.
 
Expected result:
- Tab becomes a new window.

Actualt result:
- Tab pops back to where it was, and doesn't want to be dragged again. It also refuses to be dragged horizontally now.

Workaround:
- Clicking and dragging a different tab heading seems to snap it out of it.

STRs:
 1. Open https://jsfiddle.net/jib1/pz5pynyf/ as a second tab.
 2. Click "Allow" in the permission prompt if you get one (this primes the 60-minute permission grace period)
 3. Refresh the page ↻ and then while the page is loading, in one swift motion, drag the tab heading downward and release to create a fresh window.
 
Expected result:
- Tab becomes a new window.

Actualt result:
- Tab pops back to where it was, and doesn't want to be dragged again. It also refuses to be closed or dragged horizontally now.

Workaround:
- Clicking and dragging a different tab heading seems to snap it out of it.