Message Timer Pro is a free Chrome extension developed by ellienora00. It falls under the category of Browsers, specifically Add-ons & Tools. As the name suggests, this extension measures the time it takes to send a message to a content script and receive it back.

The main purpose of Message Timer Pro is to provide users with an insight into the efficiency of message sending within the Chrome browser. It is a basic extension that caters to conscious individuals who are interested in monitoring the performance of their messaging activities.

With Message Timer Pro, users can easily track the time it takes for a message to be sent to a content script and returned. This information can be valuable for those who rely on quick and efficient communication within their browsing experience.

Overall, Message Timer Pro is a straightforward and helpful tool for measuring message sending time in Chrome. It is a useful extension for those who want to optimize their messaging activities and ensure efficient communication.