Hello

Thanks for the quick response.

Most probably. Disable javascript in Firefox and try to log in.
That's a good starting point.

Yes I tried that with firefox and JS disabled. Gmail is smart enough to send you a version of the HTML page that does not require JS and you can log in. So JS is probably not the issue why I cannot login with dillo. I had some more time yesterday to look into the problem. It seems for whatever reason, dillo is not sending the form's POST HTTP request when I click on the "Sign In" button of the login form. I'll look into the problem. If it is truly a bug I'll let you guys know.

  Good. Is JS your expertise area?

Not exactly. I am working of some other project right now, but later I may have the necessary time to devote in learning. I'll keep the JS issue in the back of my mind.
 
Best regards
Richard Ta-Min