Hi,

Please check if this happens in Safe Mode.

Problematic Extensions

Troubleshooting Extensions and Themes

Uninstalling Add-ons

Uninstalling Toolbars

No, this does not happen in safe mode.

I reset addons and it did solve the issue.

That problem can be caused by the Yahoo! Toolbar or the Babylon extension that extents too much downwards and covers the top part of the browser window and thus makes links and buttons in that part of the screen not clickable.

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

You're probably correct, as I reset my addons and toolbars, etc., which corrected the problem. I haven't tried installing any toolbars again yet to test your point. Thanks for the suggestion.