Move to New Window opens an empty browser window in FF 52.0.2

[bvv118]

When you right-click a private tab and choose 'Move to New Window' an empty non-private browser window opens. Same thing happens when you grab a private tab and drag it outside of the tab-bar.

It used to work OK in Firefox ESR 45.8.0, but stopped working in Firefox ESR 52.0.2
I'm using Private Tab 0.2.1.2.

NVM, just saw it was already reported as issue #242