Recent visit to the page element title attributes into all pages of buttons titile attribute.
When there is an element with the page title attribute, and is viewed. Then you have access to any page button, will appear recently viewed element title attribute content. And this issue across the site. I think this should be a firefox bug, hoping to repair.
Opaite Mbohovái (1)
Issues with tooltips not working properly have been reported to be caused by the Google Toolbar (Tools > Add-ons > Extensions)
You can check if there is an update available that fixes that issue.
You can try to uninstall and reinstall the latest GT, that has been reported to work.
- http://www.google.com/tools/firefox/toolbar/FT5/intl/en/
- http://tools.google.com/tools/firefox/toolbar/FT5/intl/en/install.html
See also Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems