NOTE: If you are looking to install the Gmail Message Preview Chrome extension, please read Getting Started with Gmail Message Preview.
If you see an upgrade message when you start Gmail, it means you need to upgrade or turn off GGmail Message Preview.
To remove the upgrade message at the start of Gmail, you have two choices:
- Upgrade Gmail Message Preview. To upgrade, go to this page: Upgrade Gmail Message Preview
- Disable (turn off) Gmail Message Preview. You can also turn off Gmail Message Preview in your Gmail account. To do this, follow the steps on this support page: How to disable Gmail Message Preview by cloudHQ