Can you post a link to a publicly accessible page that doesn't require authentication (signing on)?

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Firefox/Tools > Add-ons > Appearance).

• Do NOT click the Reset button on the Safe Mode start window.

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

No I cannot. We are behind a massive firewall. I've tried the Safe Mode trick. Nothing. Thanks for trying to help.

I'm struggling to think of a way to block the title attribute tool tip... two things come to mind, but it's unlikely they are happening accidentally:

(1) Blank child node title will block parent node title. What I mean is:

<a href="blah" title="link title"><span title="">link text</span></a>

(2) Scripts can do it, but probably you would know whether you are doing this...

Example: javascript - How to disable tooltip in the browser with jQuery? - Stack Overflow

Edit: Escaped HTML.

Can you post a stripped down version of the code that is used and that shows this problem?

Excellent observations both.

I know what you mean in #1. We don't code that way.

We have not written any jQuery that is blocking. The other developers that have upgraded to 22.0 or 23.0 don't have the problem.

Create a new profile as a test to check if your current profile is causing the problems.

See "Creating a profile":

• https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
• http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues

If the new profile works then you can transfer some files from an existing profile to the new profile, but be careful not to copy corrupted files.

• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox