If images are missing then check that you aren't blocking images from some domains.

See:

• http://kb.mozillazine.org/Images_or_animations_do_not_load

• Check the permissions for the domain in the current tab in Tools > Page Info > Permissions
• Check that images are enabled: Tools > Options > Content: [X] Load images automatically

• Check the exceptions in Tools > Options > Content: Load Images > Exceptions
• Check the "Tools > Page Info > Media" tab for blocked images (scroll through all the images)

There are also extensions (Tools > Add-ons > Extensions) that can block images.

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

Thanks cor-el, but none of the above provided the solution.

Seems I an not alone with this problem, see ....

    http://support.mozilla.com/en-US/questions/763773

Did you see any of the missing images grayed in Tools > Page Info > Media ?

You can use these steps to check if images are blocked:

• Open the web page that has the images missing in a browser tab.
• Click the website favicon (How do I tell if my connection to a website is secure?) on the left end of the location bar.

• Click the "More Information" button to open the "Page Info" window with the Security tab selected (also accessible via "Tools > Page Info").
• Go to the Media tab of the "Tools > Page Info" window.

• Select the first image link and scroll down through the list with the Down arrow key.
• If an image in the list is grayed and there is a check-mark in the box "Block Images from..." then remove that mark to unblock the images from that domain.

No images info greyed in list Tools > Page Info > Media. Block images checkbox is blank Tried this as suggested in questions/763773

Tried IE9 again icons & images are OK. Tied going back to FF 3.6.17 but the problem is still there.

This is a recent problem (after installing FF4),

Did you check other possibilities in the KB article?

• http://kb.mozillazine.org/Images_or_animations_do_not_load

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

If it does work in Safe-mode then disable all extensions and then try to find which is causing it by enabling one at a time until the problem reappears.

• Use "Disable all add-ons" on the Safe mode start window to disable all extensions.
• Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

In Firefox 4 you can use one of these to start in Safe mode:

• Help > Restart with Add-ons Disabled
• Hold down the Shift key while double clicking the Firefox desktop shortcut (Windows)

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

You can also try "Reset all user preferences to Firefox defaults" on the Safe mode start window.

• http://kb.mozillazine.org/Resetting_preferences

THIS WORKED ..... (last option above, many thanks cor-el)

Open "C:\Program Files\Mozilla Firefox\firefox.exe" -safe-mode

Check "Reset all user preferences to Firefox defaults"

Click "Make changes & start FF"