-*- mode: outline; coding: utf-8; fill-column: 90 -*-

* Setting up environment.

In 'about:config' set this variable:

  javascript.options.showInConsole = true

                Logs errors in chrome files to the Error Console.

  javascript.options.strict = true

                Enables strict JavaScript warnings in the Error Console.

  extensions.logging.enabled = true

                This will send more detailed information about installation and update

                problems to the Error Console.

  https://developer.mozilla.org/en/Setting_up_extension_development_environment

                setting up profile, options and about developer plugin

* Useful developer plugin.

** Firebug.

Firebug integrates with Firefox to put a wealth of development tools at your fingertips

while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any

web page.

  http://getfirebug.com

                home page

  https://addons.mozilla.org/firefox/addon/1843

                download page

** Live HTTP Headers.

 * First by adding a 'Headers' tab in 'View Page Info' of a web page.

 * Second by adding a tool in the 'Tools->Web Development' menu to be able to display http

   headers in real time (while pages are being downloaded from the Internet.

 * Third by letting you edit request headers and replay an URL (beta). Look for the Replay

   button in the live window!

This project may be of some help for the following:

 * Help debugging web application.

 * See which kind of web server the remote site is using.

 * See the cookies sent by remote site.

Alternatively you can use fiddler2 (only Windows as it written in .NET)

  http://livehttpheaders.mozdev.org/

                home page

  https://addons.mozilla.org/en-US/firefox/addon/3829/

                download page

  http://www.fiddler2.com/fiddler2/

                Web Debugging Proxy

** Tamper Data.

 * Use tamperdata to view and modify HTTP/HTTPS headers and post parameters.

 * Trace and time http response/requests.

 * Security test web applications by modifying POST parameters.

Based on code and incompotable with "Live HTTP Headers" extensions.

  http://tamperdata.mozdev.org/index.html

                home page

  https://addons.mozilla.org/en-US/firefox/addon/966/

                download page

  http://jimbojw.com/wiki/index.php?title=Tamper_Data

* How build Firefox.

  https://developer.mozilla.org/en/Build_Documentation

                Build Instructions

  https://developer.mozilla.org/en/Mozilla_Source_Code_%28Mercurial%29

                Getting Mozilla Source Code Using Mercurial

* Extension security.

  https://developer.mozilla.org/en/Security_best_practices_in_extensions

* Debugin Firefox.

  https://developer.mozilla.org/en/how_to_get_a_stacktrace_with_windbg

* Debugin JavaScript in Firefox.

// Logs errors in chrome files to the Error Console. Enable Components.utils.reportError().

user_pref("javascript.options.showInConsole", true);

// Disables the XUL cache so that changes to windows and dialogs do not require a restart.

user_pref("nglayout.debug.disable_xul_cache", true);

// Enables the use of the dump() statement to print to the standard console.

user_pref("browser.dom.window.dump.enabled", true);

// Enables strict JavaScript warnings in the Error Console.

user_pref("javascript.options.strict", true);

// This enables to run JavaScript code snippets in the chrome context of the Scratchpad from the Tools menu.

user_pref("devtools.chrome.enabled", true);

// This will send more detailed information about installation and update problems to the Error Console.

user_pref("extensions.logging.enabled", true);

user_pref("dom.report_all_js_exceptions", true);

** Debugging JavaScript in Firefox with Web Console.

'console.log()', 'console.info()', 'console.warn()', 'console.error()'.

  https://developer.mozilla.org/en/Using_the_Web_Console

** Debugging JavaScript in Firefox with Firebug.

With Firebug you can use 'console.log(obj)' for logging. Also output can be grouped with

console.group("name") to start a new indentation block, and then console.groupEnd().

Same but with different coloring do 'console.debug', 'console.info', 'console.warn', and

'console.error' functions.

'console.log' can format strings in the great tradition of printf.

'console.trace()' - to print trace.

  http://getfirebug.com/logging

** dump().

Set in 'about:config' 'browser.dom.window.dump.enabled' to 'true'.

All messages go to native console. On Windows this require '-console' option for 'firefox.exe'.

  https://developer.mozilla.org/en/DOM/window.dump

** Components.utils.reportError.

Write error msg to Error console (not in Web Console).

  Components.utils.reportError("msg");

  // Show the error console.

  toJavaScriptConsole();

Firefox 3.x require set preference 'javascript.options.showInConsole' to 'true' which is

default value fro Firefox 4.x.

  https://developer.mozilla.org/en/Components.utils.reportError