Ship Clipboard Keeper by Ananda

Clipboard Keeper helps you store and reuse clipboard content directly from Firefox.

Features:

Save recent clipboard text and images
Show the latest saved items in one popup
Pin important text or images so they stay easy to access
Copy saved text back to the clipboard with one click
Copy saved images back to the clipboard with one click
Save clipboard images to a file
Search through saved clipboard items
Export and import clipboard history backups
This add-on is designed for simple offline use and keeps the saved clipboard history inside the extension storage. It is useful for repeated text snippets, screenshots, notes, copied references, and images that you want to reuse quickly while browsing.