This extension lets you to copy page’s title & URL in two clicks, as the old Opera browser did. Now it’s easier to share link with someone without explaining what’s this page about.
Here is more about this add-on from the developers:
To use this extension, right click anywhere on the page, then select “Copy Title & URL” from the menu.
Also, you can specify copying format in the settings.
This extension one of the most lightweight, because it does nothing more than described above.
Check it out on the Firefox Add-ons website.