Jean,
You might want to look through the settings for Mozilla Firefox, I think it would be under the preferences or options tab. See if there's something that might affect the browswer cache or perhaps cookies. It sounds like your browser isn't maintaining the history from the last time you were at the site. I think you probably need cookies enabled to do that. I do think it's a browser setting, not the Forum.

I use Mozilla at home so once I get home tonight I can play with it. I also have IE installed so I can use it in case something doesn't work quite right on Mozilla, though I do like Mozilla.

Kitty