onBlur=“self.close()” different behaviour in Chrome and Firefox
I have a popup, launched from onClick with a URL and a name. In the popup's body tag I have
<body onBlur="self.close()">
With Chrome (Version 89.0.4389.82 (Official Build) (64-bit) on Ubuntu 20.04) it works as intended. If I move focus outside of the popup window the window closes. I can drag the popup around and resize it. I can reuse it with a different URL.
With Firefox (86.0) as soon as I touch the frame (to resize) or the header (to drag) the window closes.
I tried onfocusout, but the window goes to the background and does not close.
What am I doing wrong? Or how can I make Firefox behave like Chrome?