How to manage "Unity WebApps Chromium extension" different options? [duplicate]

Chromium now gives the user the opportunity to have a finer amount of control over the revocation of previous decisions such as the one showed above.

(Using the latest chromium provided in the package)

Go to "chrome://settings", then open the advanced settings section where there should be a "Desktop Integration" section with a checked checkbox ("Allow integration"), and a button. Click on the button and the websites for which you previously made a decision are listed. Removing any site from the list will re-trigger the integration step,

See:

1. On Firefox, go to Edit > Preferences > General tab.
2. There you'll see a Desktop integration header. Click on the Exceptions... button
3. Use the - button to remove all the website entries you'd like to be re-prompted to integrate with.
4. Click Close

That's it :)

There is currently no UI for this but there is a workaround. First install dconf-tools and then run dconf-editor

Then navigate to com.canonical.unity.webapps

And adjust the domains allowed. To reset them all you can do this command:

gsettings reset com.canonical.unity.webapps allowed-domains

Or you can also press the 'Set to Default' button