Updated wonderful addon Yslow for Firefox.
For those who are in the tank, this plugin helps to identify bottlenecks on the site affecting the download speed.
As I noted the list of changes is as follows:
1) There are sets for different types of checks.
2) Added tools - Jslint to check javascript, Integration with the service
Smush.it , which compresses the pictures on the site without loss of quality.
3) Improved design.
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Anyone who makes sites, I recommend to install if you have not done so.
A source
To upgrade