I haven't explicitly added support for that, but that's a great idea and will consider adding that.

Since it's just a matter of passing the right args to the browser, what one can do in the meantime is add a shell or Powershell script in the Apps tab. Though, currently adding custom apps isn't available in the trial.

I have just added support to specify args that will be passed to each browser. For example, the chrome --incognito flag. You'll find it in the Apps tab.

Linklever does have support for browser profiles. It should find them automatically for the major browsers.