If you are showing the orange Firefox button and abbreviated menus, then those commands are to the right of the word Edit (on the little drop-menu from the triangle).

On the classic menu bar, they are on the Edit menu.

But here are two faster options.

With your text/images/etc. selected, right-click the selection and choose Copy from the context menu.

Or, press Ctrl+c (usually works almost everywhere in Windows).

Any luck?

Thanks so much it worked! Great news. Very grateful for that input.