Good, but clicking the notification doesn't move it on Linux.

It would be nice if it would work automatically

Does what it says, nice and simple!
Would be really great to add an option to remove the context menu item; the notification is all I need.

Yay, thank you! :) Finally, I have control over how Hangouts chat windows behave...

Does exactly what it's supposed to do, and that's perfect.

Nice simple extension if you want to send the popups into tabs, but it does not force popups to start as new tabs which was my requirement.

For that it's better and simpler to go to about:config and editing "browser.link.open_newwindow.restriction" to zero "0"

It might be nice for a later release to add this and maybe configure which popups would come as tabs or which would be allowed as native popups.

Great add on, just missing an option to pop up the window again.