When executing the following command line:
C:\>"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" "https://aaa.com" --new-window
it opens the browser in a new window but with all the toolbars - how can I open the browser like a popup?
Maybe "application mode" is what you are looking for.
Here's an example:
in Mozilla FireFox you can do it like
in Google Chrome you can do it like
This might Help
https://superuser.com/questions/459775/how-can-i-launch-a-browser-with-no-window-frame-or-tabs-address-bar
http://peter.sh/experiments/chromium-command-line-switches/