Lori is a Firefox add-on that provides the user with information about the page loading time. It helps users to know how long it will take for a page to load.
TTFB (time to first byte) is particularly useful, as it tells you how long it took to see the first byte from a remote server. This helps estimate when the browser can start laying out content. Meanwhile, TTC (time to complete) indicates how long it took for the page to display completely.
In addition to these metrics, Lori also displays the page size - including bytes fetched from the network and bytes fetched from the browser's cache - and the number of requests. This includes both network and cache requests, ensuring a comprehensive picture of site performance.
It's worth noting that the above statistics are only updated when a page is completely displayed, and the plugin requires Firefox 2.0 or later. But for those looking to optimize their site with ease, Lori is an invaluable tool for developers of all levels.
Version 0.2.0.20080521: N/A