MTC ConsultancyMTC Consultancy

Dev tools

Cookie Manager extension

A Manifest V3 browser extension for Chrome and Firefox that lets you view, edit, delete, search, import and export cookies for the current site. Everything stays in your browser — no telemetry, no remote code.

Install in developer mode

Chrome / Edge / Brave / Arc

  1. Unzip the downloaded file.
  2. Open chrome://extensions.
  3. Enable Developer mode (top-right toggle).
  4. Click Load unpacked and select the unzipped folder.
  5. Pin the extension from the toolbar puzzle icon so it shows next to the address bar.
  6. Open any site and click the icon — the popup lists that site’s cookies.

Firefox

  1. Unzip the downloaded file.
  2. Open about:debugging#/runtime/this-firefox.
  3. Click Load Temporary Add-on… and select manifest.json inside the unzipped folder.
  4. Firefox temporary add-ons are removed when the browser quits. For permanent install, we’ll publish the signed XPI on Mozilla Add-ons (AMO).

Store deployment (roadmap)

We’re preparing store listings for the Chrome Web Store and Firefox AMO. Both require the same source tree and a privacy policy — see the extension privacy policy.

Permissions

  • cookies — read and write cookies for the current site.
  • activeTab / tabs — scope actions to the active tab.
  • storage — remember the “first run” explainer dismissal.
  • downloads — save exports to your machine.
  • host_permissions: <all_urls> — required by the browser to read cookies for any site you open the popup on.