Hi George, is this a problem viewing pictures that you received, pictures you are sending (while you compose) or pictures you sent (after being processed by the mail service)?

Which mail service do you use (e.g., Yahoo, Gmail, Windows Live Hotmail)?

By default, Firefox will try to apply a color profile if it is specified in the image file. However, this does not always work out well.

You can turn off color management, or you can specify a color profile you want Firefox to use, but these settings are a bit tricky to access. You might want to try this add-on which provides a dialog to set them: Color Management.

Or, to peek under the covers and set them yourself, check out these articles: Gfx.color management.mode - MozillaZine Knowledge Base, Gfx.color management.display profile - MozillaZine Knowledge Base, About:config - MozillaZine Knowledge Base.

I installed color management and no change. It does it to the incoming email pictures. If I save the picture to a file the green crap goes away.

After you unchecked the box (so that Firefox's color management was disabled), did you restart Firefox?

It's hard to think of any other explanation for color changes on images. Maybe another forum contributor will have some additional ideas.

Do those images have an embedded color profile?

In that case they may not display correctly in Firefox even with color management disabled.