Murry, I am using Firefox 27.0.1 and haven't had any of those problems. So I don't think it is your browser. Since the days of the odd log in page and changing my home page to the forum everything has run smoothly.
If you haven't updated to the most recent Firefox, do so and report back.
Hi Grainger, I am using the Firfox "NoScript" plugin as part of my security lock-down, so my browser's behaviour may differ from yours. Are you using Firefox's secure password storage to automatically enter your user name and password when you log on?
I am pretty sure my Firefox is not at fault, it works fine with a large number of other sites and forums and was working fine with the old Bottlehead site. Anyway, I am using Debian stable, so it is not advisable to upgrade to an unstable package.
I will wait patiently to see how things go from here, as I am still able to log on manually... :-)