Hi there,

It should be in the menu -> Extensions and themes. You can also access that page via Settings -> Extensions & Themes, or by entering about:addons in your address bar.

I get to "Manage Your Extensions" but all I can find is a list of recommended extensions. Nothing I click on brings me the addons that I may have on my machine. However, there are hundreds that I can choose from a list I have no interest in perusing.

Am I doing something wrong? Is there another page hidden somewhere that has my addons?

I am totally baffled.

That should mean you don't have any add-ons. Please note that no add-ons are included in Firefox by default*, so unless you have installed some, you won't have them.

*There are some built-in features bundled as extensions, but they are not extensions in classical sense: you can't manage it remove them, and they won't appear on about:addons.