Google has launched a new site that promotes the use of techniques to make web pages load faster. The site shares some of the tools and ideas that are used within Google to optimize its own web sites.

The article on caching uses HttpWatch to show the difference in performance when the Expires header has been correctly set:

Anyone using Firefox 3.5 Beta 4 will find that they will be automatically upgraded to Firefox 3.5 Preview in the next few days. This version is neither a beta nor a release candidate;  it effectively lies between those two stages in the development cycle.

You’ll need to install HttpWatch version 6.1.39 or later if you want to use it with this new version of Firefox.

The HttpWatch Properties window reports this updated version as ‘Firefox 3.5b99’ :