CodeCopy
A browser extension that adds copy to clipboard buttons
...The extension detects code snippets on pages like GitHub, MDN, Gist, Stack Overflow, StackExchange, npm, Medium, and others, then overlays a small copy icon or button in the corner of each block. When a user clicks the button, codecopy uses the Clipboard API (or fallbacks) to copy the snippet to the clipboard with minimal visual noise or disruption. The repository provides the extension source, manifest, and build pipeline so that developers can contribute new site matchers or customize behavior. It is distributed under an MIT license and is available for multiple browsers, including Chrome, Firefox, and Opera.