You will see your extensions under this icon. Clicking on it will bring down the dropdown where you can pin your MetaMask extension: You can find details about your extension in the Manage Extensions section: chrome://extensions/ or by clicking the 3 dots menu on the right next to the extension you would like to manage. you can call this Metamask Payroll Support ++1-860-254-1247 Number Monday through Friday from 8:00 AM to 9:00 PM ET and Saturday from 9:00 AM to 6:00 PM ET Number.