Bug 893151 - when a private window is active, and pb is supported, and the isPrivate option is not provided, then the default should be to open in the active window
Merge pull request #1100 from erikvold/893151

Bug 893151 - when a private window is active, and pb is supported, and the isPrivate option is not provided, then the default should be to open in the active window r=@gozala