1. firebug
It is used to debug JavaScript and modify HTML and CSS interfaces. Some common network analysis extensions are also based on firebug and are very useful.
2. yslow
Yslow is developed by Yahoo. A firebug-based tool for analyzing Web page performance provides a set of rules on how to improve website performance, optimize the speed of web pages, and establish high-performance web pages.
3. Page speed
Page speed is a tool developed by Google similar to yslow. It is also based on the firebug plug-in. website administrators and network developers can use page speed to evaluate their webpage performance, and get suggestions on how to improve performance.
4. Web Developer
Web Developer is integrated with a series of web development tools, such as HTML, CSS verification, form modification and other functions. It has powerful CSS debugging and form debugging capabilities and provides comprehensive PAGE analysis, you can disable any inline, document, or external CSS on the page and edit the current CSS directly.
5. Live HTTP headers
View the page and record all HTTP headers to analyze the status codes of each HTTP header.
6. httpfox
Monitors and records all data sent and received during HTTP access, including URL addresses, HTTP headers, transmission parameters, and other information.
7. User Agent switcher
The browser switch can make Firefox pretend to be another browser, and other browsers, such as the iPhone, can access the website. I used this extension to simulate iPhone login to experience Google buzz in advance.
8. Coral ie Tab
Enhanced version developed based on ietab. It simulates the Internet Explorer engine in Firefox to access webpages.
9. measureit
You can measure the length and width of any selected area on the page.
10. colorzilla
You can select a color from a page or a color palette, and scale the page.
11. fireftp
Implement the FTP function in Firefox.
12. greasemonkey
This allows you to use JavaScript to implement some special customization functions on the browser. There are hundreds of JavaScript Based on greasemonkey.CodeAvailable.
13. View Source chart
Improves Firefox displaySource code.
14. html validator (based on cse html validator)
To use the HTML verification engine of CSE, you must install cse html validator for Windows, which has the lite version.
15. wmlbrowser
Simulate WAP access to WML web pages.