With the old “akregator” you could do this. With the new “akregator”, it does not seem to work.
I have logged into a site with akregator. And that works fine. But as soon as I close that tab in akregator, I am no longer logged in. The next time I go to that site in an akregator tab, I am logged out. It looks as if “akregator” is not retaining login cookies for its browser.
It does retain cookies for the feed reader component (at least I think it does). If I login to a site in “konqueror”, then I am also logged in for the feed reader component of akregator. But I am not logged in for a browser tab in akregator.
When you want to browse an akregator item, I suggest browsing in an external browser. That works, and you can login there. I’m currently using “opera” for that, but I’m using “firefox” for openSUSE forums.