Activate Pro with a key
Paste the license key from your purchase email. It looks like
XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX. Activating counts as one device.Use on another browser or device
Browsers don't share storage, so Pro and your progress are normally per-browser. This link carries your license and tool progress (checklist, copy, validated flags, pricing - not images) to another browser. On the same machine (e.g. Chrome → Firefox) it reuses your activation, no extra device slot. On a different machine it activates there and uses one of your device slots, so it stops working once your activation limit is reached. Treat the link like your key: anyone who opens it can take a slot, so don't share it publicly.
License keys are stored only in this browser and validated against the license server. Deactivating frees the activation for another device. Lost your key? Reply to your purchase receipt and it will be resent.