Opens extra incognito window after 1st run

[wang-henry4]

I'm new to Flexx but I couldn't find any information on this problem so apologies if it has been solved already.
I am currently running the example apps for the desktop with the following code.

from flexx import flx
class Example(flx.Widget):

    def init(self):
        flx.Button(text='hello')
        flx.Button(text='world')
app = flx.App(Example)
app.launch('app')
flx.run()

It works fine the first time it is run, however after closing the window and running again it always starts an extra incognito window along with the app itself. After doing some digging it seems if I open the app in browser mode chrome will have a notification that the previous tabs were not closed properly and ask if I want to restore them. The problem is solved by dismissing that notification and running the app again in desktop mode, but will appear again if I close and relaunch.

I am using python 3.7 and Chrome for the browser.

[almarklein]

I can indeed reproduce this (using app.launch('chrome-app') to avoid it creating a FF app). This is odd. I don't have a solution at hand.

The real issue is in webruntime by the way ... somewhere around here: https://github.com/flexxui/webruntime/blob/master/webruntime/_chrome.py#L104