Install Cairn for Chrome

One click and you're recording. Cairn lives in the Chrome Web Store.

Already have the extension? Sign in — it picks up your session automatically.

1. 1

   Download the latest build

   Grab the newest cairn-v*.zip — it's hosted right here on the site.

   Download cairn-v1.0.2.zip

   (Or if you have the repo cloned: cd extension && npm run package — the output is extension/cairn-v*.zip.)

2. 2

   Unzip it somewhere permanent

   Pick a folder you won't delete by accident — Chrome loads the extension from disk every time it starts, so moving or deleting the folder breaks it.

3. 3

   Open Chrome's extensions page

   Paste chrome://extensions into your address bar, or click the three-dot menu → Extensions → Manage Extensions.

4. 4

   Turn on Developer mode, then Load unpacked

   Flip the Developer mode toggle in the top-right corner. A new action row appears with three buttons — click Load unpacked and pick the folder where you unzipped the build (the one containing manifest.json).

   Cairn appears in your extension list. If Chrome complains about a missing manifest, you picked a parent folder instead of the one that contains manifest.json.

5. 5

   Pin it to your toolbar

   Click the puzzle-piece icon in Chrome's toolbar → find Cairn → click the pin icon. The Cairn logo (a yellow/orange stacked S) now sits in your toolbar.

6. 6

   Sign in and start recording

   Click the Cairn toolbar icon to open the side panel. Hit Start recording and use the web normally — every click becomes a step.

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