Right we allow any window to window.open into a common named window. To my understanding, this can allow a window to change TabGroups as it is possible for two TabGroups to become connected through a call to window.open. We should make named windows be scoped based on the originating TabGroup.
The patch I'm working on for bug 1303196 will do this, so I'm assigning this to myself.
The patch is now up in bug 1303196, so I'm marking this as duplicate.
10 months ago