This forum "see's" that you have that plugin installed in both extensions and plugins. (under More system details... in your posting) I don't know why the Ancestry.com website can't "see it".

Under extensions:
Ancestry.com Advanced Image Viewer
1.0.0.1
true

Under installed plugins:
Image Control Plugin for viewing images on Ancestry.com. Version 1.0.0.1

Sorry, I do not understand the reply to my query.

Firefox says you do have that image viewer installed, that problem is with the Ancestry.com website not recognizing that it is now installed.

Try doing {Ctrl + F5} when viewing a page that gives you that message, to reload the web page from the server. You might be seeing cached information.

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).

• Don't make any changes on the Safe mode start window.

See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems

Ctrl+F5 does not make any difference

Sorry, I have tried you suggestion but it makes no difference.

I still canno view any images on the ancestry website.

Sorry, I have tried you suggestion but it makes no difference.

I still cannot view any images on the ancestry website.

I have tried your suggestion without it helping. I use Windows XP and the Enhanced Image Viewer opens perfectly with Internet Explorer but it justs keeps flashing at me and telling me I need to download on Firefox.

Barbry, Are you the original poster in this forum thread - berkshound?

If not, open Tools > Addons > Plugins and see if the Ancestry.com Enhanced Image Viewer is listed there.

Yes, I am the original poster.

And the ancestry image viewer is present as an extension and a plug-in.

Sorry, I am not Barbry. I am the original poster of this query.