Rated 5 out of 5 stars

The add on Extended Copy Menu did the job for me.
I've loved Copy Plain Text and used it a billion times, but I could not get it to work with with FF 3.6, even using the arcane tips about editing and adding files to a deeply buried folder.
I've got Win7 64 and finally, finally found relief with Extended Copy Menu.
The 5 stars are for Extended Copy Menu.
Goodbye to an old friend. Hello to a new one.