Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

• Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"

"Remove Cookies" from sites causing problems:

• Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

• Don't make any changes on the Safe mode start window.
• https://support.mozilla.com/kb/Safe+Mode

• https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

Thanks for the reply but none of what you suggested worked. The link i'm going to points to a local pc on my network.

http://server/maximizerwebaccess/Dialogs/UDF/EditTableUDF.aspx?entrykey=LLZb1RTdjwksbsbN2G%2fLsBq7NDzGgoQng%3d%3d&defkey=q5WRoTIznE1ZYe1FIY49dxYfoPnRTdjwksbsbN2wTfK&mode=edit

since this is an .aspx page doesn't that explain why IE7 can display the checkboxes and FireFox 3 can as well but FireFox 5 will not. Any related suggestions please. I've already tried all the usual fixes.

Without taking a look at the code or checking that page in Firefox 5 it is hard to tell what is wrong with it.

Do you see any errors related to this in the Tools > Error Console?

Is any content being generated via JavaScript?

If you are comfortable with checking code on web pages then try the DOM Inspector.

• https://developer.mozilla.org/En/DOM_Inspector
• https://developer.mozilla.org/en/Introduction_to_DOM_Inspector
• DOM Inspector: https://addons.mozilla.org/firefox/addon/dom-inspector-6622/

I'm getting a lot of the following errors on the URL. Warning: Error in parsing value for VARIABLE. Declaration dropped. Source File: http://thor/maximizerwebaccess/Content/ContentPage.aspx Line: 0

Tried DOM but didn't get very far. Couldn't generate any kind of meaningful report.

Was it something I said?