webextensions-examples/selection-to-clipboard/README.md

selection-to-clipboard

This add-on injects JavaScript into web pages. The addons.mozilla.org domain disallows this operation, so this add-on will not work properly when it's run on pages in the addons.mozilla.org domain.

What it does

This extension includes:

• a content script, "content-script.js", that is injected into all pages

The content script listens for text selections in the page it's attached to and copies the text to the clipboard on mouse-up.

What it shows

• how to inject content scripts declaratively using manifest.json
• how to write to the clipboard

Note

• If the copySelection function was in a browser event clipboardWrite permissions would be required e.g.

"permissions": ["clipboardWrite"]

See Interact with the clipboard.