During installation, I have installed both Chrome and Firefox extensions. Chrome extension is running on the browser.
I create a new project, add Universal Web Application. Then I setup the StartPage on the properties. I click on "Start Interrogation" (Chrome is not started before that). Chrome starts, it opens the website that I configured on StartPage... but there is no Interrogation Form window, therefore I am not able to do anything else.
Tried with Internet Explorer, it worked fine, I am able to interrogate the web page.
Assuming that the browser extension is enabled, I cannot think of a specific reason. If it is enabled and still not working, I would suggest that you open a support request (SR). That would mean that this issue is likely environmental and will require someone to get onto your machine. If you do open an SR, please post the SR number here so that we can add the resolution to this post.