Brilliant--a must have! Rated 5 out of 5 stars
I thought of this need a few days ago and was thrilled to see a lightweight add-on implementing it. I now use this as part of my normal workflow.
Periodically I go clean out my several-hundred open firefox tabs and for tasks that are still in progress, I save the hyperlinks off to my project management database as new tasks or projects. When I'm ready to resume work on the task, I just copy the list to the clipboard and use Launch Clipboard to revert them.
Now if the author would add support for the inverse operation: capture URLs from selected tab to right-clicked tab to the clipboard, we would have a complete system!