I’ve been having this problem myself…pretty much forever. It happens on multiple computers and multiple installations of WordPress with different versions of the Firefox browser. Can anybody explain?
I think cody has explained it pretty well, but just to reiterate:
Firefox _will_ let me into the administrative back-end, and once there, everything works fine. It’s only when on the public side of your site that WordPress seems to have no idea who you are when using Firefox. So for example, rather than presenting “Log Out” and “Site Admin” options over in the sidebar functions, in Firefox it presents “Log In” and “Register” links. Clicking the “Register” link does, in fact, take you to the registration page, yet clicking the “Log In” page brings you to the administrative dashboard.
Similarly, in Firefox the “Edit” links on the public post display will not appear, and even the WordPress Stats plugin counts your visit as a non-logged-in user. Also, the commenting form doesn’t identify you as a logged in user. And yet, I assure you, I am logged in. I can go directly to the wp-admin directory and WordPress knows who I am.
This is really bothersome, and I’ve lived with it for a long time now hoping that it would eventually be resolved, and I’m surprised that nobody else is talking about this on these support forums. Could it really just be me and Cody?
Have you checked your themes, maybe try resetting to default theme and trying everything then.
God, this is funny, but posting here actually inspired me to check something out that I hadn’t considered. I remembered a similar problem that I was having once with a forum that I had installed, and the solution was actually the same. The problem lay in the blog settings.
On the General tab of the Settings interface, there is something that says: “WordPress Address (URL)”. I had this set to http://www.uatu.net/blog/, but actually, I’ve got this set up as a subdomain, so even though that’s technically the correct directory, the address that works is http://blog.uatu.net/. Anyway, this created a rather weird result in which to read the blog, I’d use the subdomain, but to use the administrative features, I’d use the /blog/ URL. Firefox was apparently caching my login info for the /blog/ directory but not for the subdomain version of the URL.
Anyway, now that I’ve changed the settings, everything is sorted out.
