diff -r 69056cd4b001 -r d7142397bfb3 firefox-devel.rst
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+++ b/firefox-devel.rst	Sun Nov 07 19:57:25 2010 +0200
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+-*- 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
+
+* Extension security.
+
+  https://developer.mozilla.org/en/Security_best_practices_in_extensions