The LORI plugin for FireFox will add a status bar at the bottom right corner of Firefox and will display:
* TTFB: how long it took to see the first byte from remote server (from click to first byte received). This value gives a rough estimate on when the browser can start laying out the content.
* TTC: how long it took to display the page (from click to complete drawing of the page)
* Page size (number of bytes used to display the page): this value includes both bytes fetched from network and bytes fetched from the browser’s cache.
* Number of requests: number of requests used to fetch the page’s content (images, style-sheet, javascript ….). Again, this value include both network requests and cache requests.
Notes: that the above stat is only updated when a page is completely displayed (the progress bar is no longer displayed).
You can download the plugin here: