BuiltWith is a “website profiler, lead generation, competitive analysis and business intelligence tool providing technology adoption and usage analytics for the internet.”
BuiltWith is a very useful tool for finding out what services and technologies are being used on any given website. The tool has a Firefox and Chrome extension available which makes it a lot more accessible for the geeky type.
If used properly, Firebug can be a very useful tool in helping diagnose performance issues or simply provide an in-depth insight in to a web application or site.
Using the Firebug profiler to get Javascript statistics on a given page is very easy and takes very little time to set-up.
One weird thing I noticed when I upgraded to Firefox 4 is that you no longer get offered the option of saving your tabs on exit.
This often came in handy for me at times when I needed to restart the browser for what ever reason (plug-in install, computer restart, etc) so I do wonder why it is disabled by default on Firefox 4.
Perhaps it is not used as often as I thought it might be…
Anyway, you can easily re-enable this prompt by following the simple steps below: