Yes. This is an excellent replacement for Copy URLs Expert, or Copy All URLs. Copy ALL Tabs only copies the tabs to the Clipboard. You must then use it with another add-on that performs a PASTE of what has been copied to the Clipboard.

Here is what is working for me, now...

Copy All Tab Urls WE
by Michele Pezza
https://addons.mozilla.org/en-US/firefox/addon/copy-all-tab-urls-we

Combined with...

Multiple Paste and Go Button
by Wantora
https://addons.mozilla.org/en-US/firefox/addon/multiple-paste-and-go-button