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

• Do not click the Reset button on the Safe mode start window or otherwise make changes.

• https://support.mozilla.org/kb/Safe+Mode

• http://kb.mozillazine.org/Images_or_animations_do_not_load
• https://support.mozilla.org/kb/Images+or+animations+do+not+show

Your system details list shows that you have two Flash Player plugins installed.
You should remove the older Flash 9 version.

1. Shockwave Flash 11.4.402.265
2. Shockwave Flash 9.0.45.0

See:

• [/questions/937165]
• http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html

Thanks for this. I could not select Shockwave Flash 9.0.45.0 - but downloaded the uninstaller from Adobe which removed the newer Flash 11 version. I reopened Firefox in Safe Mode and yes, Flash 9 was still there. I ran the uninstaller again - after closing Firefox. It said that Flash was removed however when I reopened Firefox in Safe Mode - Flash 9 was still there - disabled - but there. Nothing appears in the Control Panel/Programs list. So how do I uninstall this older version?

Graphics problem continues in Safe Mode.

After reading: Flash 9.0 r28 and below: Your Windows list of installed programs may have an entry for "Adobe Flash Player ActiveX" but this will only remove the Flash Player for Internet Explorer and AOL. To completely remove Flash from your system, download the Flash uninstaller from Adobe.com. To remove Flash from Mozilla browsers only, delete these Flash plugin files from all locations. [17] I searched for but did not find:

NPSWF32.dll 

flashplayer.xpt

This sort of stuff is out of my comfort zone!

You can set the plugin.expose_full_path pref to true on the about:config page to see the full path of plugins on the about:plugins page.

• http://kb.mozillazine.org/Issues_related_to_plugins#Identifying_installed_plugins

• http://kb.mozillazine.org/about:plugins
• http://kb.mozillazine.org/about:config

It is best not to leave that pref set to true as it exposes that full path to web servers via the navigator.plugins object, so reset that pref to false after you are done with the about:plugins page.

See also "Manually uninstalling a plugin":

• https://support.mozilla.org/kb/Troubleshooting+plugins

Can you attach a screenshot that shows the problem with the websites?

• http://en.wikipedia.org/wiki/Screenshot
• https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem

Use a compressed image type like PNG or JPG to save the screenshot.