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Gmail: copy visible senders

Collects the email addresses of every visible sender in the list and copies them to the clipboard, one per line.

Code to copy

// Copy every visible email sender to the clipboard
const names = [...document.querySelectorAll('tr.zA span[email]')]
  .map(s => s.getAttribute('email'))
  .filter((v, i, a) => v && a.indexOf(v) === i);
navigator.clipboard.writeText(names.join('\n'))
  .then(() => alert(names.length + ' sender addresses copied.'));

How to use this example

1. Copy the code with the button above.
2. Install JustZix (2 minutes) and open the extension on the target page.
3. Add a new rule matching that page.
4. Paste the code into the rule's JavaScript panel and save — it runs on every page visit.