Install the extension

1. Unzip the download, then move the unzipped folder somewhere permanent — your home folder is fine. Chrome loads the extension from that folder every time it starts, so moving or deleting it later uninstalls the extension.
2. Open chrome://extensions in a new tab.
3. Turn on Developer mode using the switch in the top right.
4. Click Load unpacked and pick that folder — the one with manifest.json directly inside it.
5. Click the applyapply icon in your toolbar and Sign in. The same account and credits you already have.