Last question 1st
In FF the SA green bar is in the bottom right corner. Left click the Down arrow and choose options. Secure serach can be disabled there.
The popup is genuine. Either accept it or uncheck the box and click Finish if you don't want it. It is simply asking you if you want to make Search more secure. Doing so will restrict some websites from opening though, so it's up to you.
Secure search is available on Site adviser Live
I do not use it though might be good to try it.
First thanks "Peacekeeper" for you response and all those who were reading my post.
But follow up questions (more detail questions).
1. As you have suggested, I looked in FF the SA green bar and found the tab for Secure Search. Currently, Enable Secure Search in my browser is uncheck. So this corresponds to the "'Activate Secure Search box within SiteAdvisor (recomended)" in the popup reference in my orginal question? So if I check this in the popup menue here is where I would deactive it if I don't like it? Can you confirm that?
2. In the popup the second check box is "'Activate Secure Search on your browser (recomended)". So if I check it here in the popup and activate it where do I go to deactivate it? I would assumed it is in the browser in FF, but where?
3. What is the fuctional difference difference of these two (Secure Search in SiteAdvisor and Secure Search in the browser)?
4. The link listed above http://service.mcafee.com/FAQDocument.aspx?lc=1033&id=TS100596 said "Article Not found" (id you enter was not reconized).