When I clicked on the link to some known news source for which I didn't have on FR file the needed login info, I'd get a screen (that you guys wrote) that asked me to either provide one-time the needed login info, or select the option to "Don't ask me again on this site, as I can handle my own login, thank-you kindly".
On on another My Account page I could list, update, delete my login info for each supported news web site.
I suspect that what I'm suggesting here is too difficult, because it seems to involve automating responses to ever changing login screens of dozens of news web sites. Life is too short for that crap. But I'm no web meister, so perhaps that part isn't such a pain.
And the other gotcha that comes to mind -- if some computer in sunny Freeper California (or wherever your FR server is) logs in for me, how to we transfer that login info to my nice little PC? Having a javascript do the login for me right off my PC seems to be pushing javascript further than even the Sun marketing rep would consider practical. Can a javascript transfer the cookie?