Simple seconds counter fires on document ready
What is Page Timer?
Page Timer is a Firefox add-on that displays a simple seconds counter on document ready. It is designed to help users keep track of the time spent on a web page easily.
Page Timer is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install Page Timer if you trust the publisher.
Page Timer has earned a fairly good reputation and likely can be trusted.