Update: Google has removed the Page Speed extension for Firefox from the official web site. A comparable add-on that you may want to try out is Yslow which works with Firebug as well.
Page Speed is a new and interesting website optimization add-on for the Firefox Firebug extension.
The Page Speed extension requires the Firefox web browser and that the Firebug extension is installed as well before you can install it to the browser.
Two new tabs are added to the Firebug menu after installation which you can use to analyze the performance of the website you are on.
A website optimization report is generated that groups the findings by priority. The high and medium priority groups list elements that should be optimized first as they will yield the best turnover in regards to website performance.
Low priority items on the other hand are fully or partially optimized items that can still provide some performance gains but not as much as the medium or high priority items. This means that you should address all high priority items first, then medium priority items and then all other items that can be optimized as well.
Each entry is listed with a short description, its priority and an area that you can expand that lists the elements that are affected and optimization tips on how to resolve the issue.
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