firebug

If there's any image or style that's out of line, checking it out with Firebug is the best response.

A JSON object like the one shown in Listing 1 can be inspected during development time using tools like FireBug or simple JavaScript alerts.

Let Firebug be your eyes and it will measure and illustrate all the offsets, margins, borders, padding, and sizes for you.

You may have noticed that all CSS styles that apply to the selected element are shown in blue on the right-hand side of the Firebug panel.

Use the Firebug extension to trace which files load slowly, and I bet that your JavaScript files are among the slowest.

There is no question that Firebug offers a much more natural way of working with JavaScript and that it offers great flexibility.

To verify the Apache version, you can check Firebug's Net panel and look for the Server response header of any request.

After you have done a few other things within the application, you may have profiling code to supplement Firebug (a Firefox extension).

Become familiar with Firebug and with the HTTP requests and responses for the transactions of interest.

FireBug: Web debugging tool. ". . . absolutely outstanding. . . nothing beats the DOM information and JavaScript debugging. . . "

Total requests, elapsed time, and size of content are shown at the bottom of the Firebug window.

Firebug offers debugging, profiling, logging, and a command line console.

Firebug provides detailed JavaScript profiling analysis to determine critical areas of code to improve.

Two useful Firefox add-ons are LiveHTTPHeaders (used to view normal HTTP traffic), and Firebug (used to measure load times of resources).

Firebug is downloadable from many locations, and you can get a link to it in Resources.

It includes a JavaScript console, logging API, and a useful Network Monitor.

Once activated, the different Firebug features are listed at the top -- for now, focus on the HTML option.

On the left-hand side, Firebug displays the code; on the right side, it shows all defined variables and objects for the current scope.

Firebug: This plug-in for Firefox is an indispensable tool when working with Ajax applications.

The rest of this article discusses Firebug features.

This article uses the Firebug plug-in for Firefox as it is a great tool for Ajax debugging.

Firebug is a revolutionary Firefox extension that helps web developers and designers test and inspect front-end code.

No problem: check out the built-in developer tools, which are very similar to Firebug.

In addition, compare Firebug output with your actual perceived performance.

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Resemble your so remarkable man, no matter where be, resemble inky medium firebug is same, in that way bright, in that way conspicuous.

Using Firebug, you can monitor, edit, and debug live pages, including HTML, CSS, JavaScript code, and network traffic.

Install the extension by clicking the orange Install Firebug button on the right side of the page.

Firebug is also very helpful in figuring out which style attributes are being used in the Dojo widgets.

Firebug is also a great tool for tuning CSS styles and the look and feel of a Web page.

Figure 1 shows a screen shot of a sample report generated by the Firebug profiler.

Firebug also gives you fine-grained control over which websites you want to enable it for.

The Firebug JavaScript tools include breakpoints, watch expression, and other tools found in typical debuggers.

Using Firebug and YSlow, you can thoroughly analyze your Web applications to make educated changes to improve performance.

In the search bar within the Firefox Web site, type Firebug and click Search.

If you use Firefox, Jaxer has a plugin that uses the popular Firebug plugin to debug JavaScript.

Debugging of applications from a security standpoint, using the Firebug debugger.

YSlow is a Firefox add-on integrated with Firebug, so you need to have Firebug installed before you can install and start using YSlow.

Firebug shows data sent to the server and the data returned by the server.

By default, Firebug sorts on the Percent column, with the highest values at the top.

To use Firebug's network analysis tools, simply click on the Net tab.

Firebug is a Firefox add-on that puts a wealth of development tools at your fingertips.

YSlow is a Firefox add-on integrated with the Firebug web development tool.

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You can open Firebug in a new window or in the existing window (see Figure 1).

Figure 2 shows a sample of the Firebug output for network traffic.

I make heavy use of firebug in firefox and the built-in developer tools in Chrome for debugging and profiling.

Firebug makes it simple to find HTML elements buried deep in the page.

Press CTRL-F12 to open Firebug in another window (a nice feature if you have two monitors).

If you have not done so yet, install the Firebug extension (see Resources) and restart Firefox to load it.

The extension also presents contextual information based on what is currently in Firebug's CSS and HTML panels.

Figure 3 shows the Firebug plug-in in Firefox analyzing the same page.

Figure 5 has an example of this packet, as viewed in the Firebug debugger.

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Hacking in this registry using debugging tools like FireBug (see Resources) could be useful to track, for example, leaking widgets.

With Firebug, it is easy to go to the function source; you can simply click on the entry in the list to go to the function.

You have seen how you can inspect a site using the Web Developer Toolbar, and how to modify content as needed using the Firebug extension.

Users of Firefox 3. 0 who want to try out Firebug 1. 4 should download it from GetFirebug. com, or disable version checking on AMO.

When we ship the final version of Firebug 1. 4. 0 we will set the compatibility for all users of Firefox 3. 0 and 3. 5.

Once again, you can use Firebug to watch the data being fetched form the server, as shown in Figure 4

When the page loads, you can use a tool like Firebug to watch the asynchronous loading of data, as shown in Figure 3

Firebug to debug JavaScript and CSS, to modify the DOM, and to inspect communication between the client and the server

This article helps familiarize you with Firebug features that provide

Developer Toolbar for FireBug-like debugging

Logging to the Firebug console