Hi,

Please check if this happens in Safe Mode. Safe mode disables the installed Extensions, and themes (Appearance) in Tools (Alt + T) > Add-ons. Hardware acceleration is also temporarily disabled - the manual setting is Tools > Options > Advanced > General > Use hardware acceleration when available. All these settings/options/add-ons can also be individually or collectively disabled/enabled/changed in Firefox normal mode to check if an extension, theme, option or hardware acceleration is causing issues. Disabling/enabling hardware acceleration, and some types of add-ons in normal mode may require a Firefox restart.

Uninstalling Add-ons

Uninstalling Toolbars

Troubleshooting Extensions and Themes

Problematic Extensions

Options

I assume you are clicking or double-clicking the star on the url bar. Could you check whether you have the same problem if you open the "bookmark this page" dialog by pressing Ctrl+d?

This happens if I try Control D - which doesn't work at all, or if I click on the firefox button on the top left and try to bookmark the page through that it still happens.

I have not tried doing it in safe mode yet as suggested by someone else. It used to work fine in the old firefox.

I'm also having trouble with websites not working properly or links in them not working and I get an error message saying that I need to enable the cookies BUT they are enabled so I don't know what to do. I have started used IE more due to these problems. Pity because I prefer firefox. Angela

Why can't I use Control Alt T or Control D - neither short cuts work?

Angela

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions or if hardware acceleration 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.org/kb/Safe+Mode

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