Birthday Manager is a free Chrome extension developed by kensplanet. This handy tool allows you to automatically wish your Facebook friends a happy birthday. With Birthday Manager, every day when you open your Chrome browser, the extension opens the Facebook birthday page and fills in the message boxes with random birthday greetings.

It's important to note that although Birthday Manager automates the process, some manual intervention is still required to actually send the birthday wishes. Additionally, the extension only works if you are logged into Facebook on your Chrome browser.

While the stability of the tool is not guaranteed, the main page of Birthday Manager clearly displays its current status, indicating whether it is stable or unstable. This is particularly important as the tool may occasionally experience instability if Facebook changes its page design.

Please keep in mind that Birthday Manager is not affiliated with, maintained, authorized, endorsed, or sponsored by Facebook or any of its affiliates. It is an independent Chrome extension developed by kensplanet.