Firefox Developer Extensions

To develop a web application, accurately create a web page, find out the cause of the error and view the status of the exchange between the browser and the Firefox server, it turns into software test software with extensions.

The letter Q indicates that the extension is compatible with Firefox Quantum, therefore with 57 and the next version .

Edition

View formatted source
Displays the HTML source indented and colored.

Font Finder
Displays the CSS styles for the selected content items to see how it was done.

ColorZilla
Takes a color on the page to use elsewhere. Offers a palette.

Code development and debugging

Firebug
Debugger for JavaScript and Ajax. Shows the contents of the exchange between the browser and the server.

Speed page
Performance tool for pages. Setup adds the Page Speed ​ ​ tab to the Firebug control panel (which is required), from which you can run a page analysis and get optimization tips.

Web developer
There are several tools in the menu added to Firefox.

Web Page Optimization

On Google results pages with the Cloudlet extension, you can display a tag cloud. This helps the user refine their query, but it is also very useful for the webmaster, showing the semantics associated with the keyword .

CSS Reviewer
Enables HTML code compatibility.

SEO Quake
Adds a toolbar with multiple indications of the importance of a site or page.

iWebTool
Provides access to 30 tools, especially with regard to links and site position. Domain presence. Extracting HTML content.

Kgen
Extracts keywords to a web page.

Browser and mobile compatibility

FxDT
From Firefox, you can check if an application is running on other browsers without leaving your current environment.

Fast Local Switch
Changing browser language.

XHTML-MP
Reassigning content to the mime type of mobile devices "application/vnd.wap.xhtml + xml."