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This article describes what JavaScript is and how to allow or block it on certain websites.

{for not fx23} This article describes what JavaScript® is, how to turn it on and off, what JavaScript® settings are available in Firefox and how to allow or block it on certain websites. {/for} {for fx23} This article describes what JavaScript® is and how to allow or block it on certain websites. {/for} __TOC__ = What is JavaScript? = [http://en.wikipedia.org/wiki/JavaScript JavaScript] is a standard programming language that can be included in web pages to provide functionality such as menus, sounds, and other interactive features. By default, Firefox enables the use of JavaScript and requires no additional installation. {for not fx23} = Enable and disable JavaScript = In Firefox, you can configure whether JavaScript in web pages is permitted to execute or not. To allow JavaScript in Firefox: # [[T:optionspreferences]] # In the {for win}Options{/for}{for mac,linux}Preferences{/for} window, select the {menu Content} panel. ## '''Enable JavaScript:''' Select this option to permit JavaScripts to execute on your computer. ## To change advanced settings, click {button Advanced…}. {for win,linux}<br/> <br/> [[Image:668a9022f052f20f795759846994bc3f-1260050698-426-1.png]]<br/> <br/> {/for}{for mac}<br/> <br/> [[Image:javascript-en-mac-1.jpg]]<br/> <br/> {/for} # [[T:closeOptionsPreferences]] = Advanced JavaScript settings = Through the Advanced JavaScript Settings window, you can configure the permissions for JavaScript. {for win}<br/> <br/> [[Image:JavaScript - Win2]]{/for} * '''Move or resize existing windows''': To prevent JavaScripts from changing the position or size of existing windows, deselect this option. * '''Raise or lower windows''': This option allows sites to place windows below or above existing windows. * '''Disable or replace context menus''': When you right-click an item, a sub-menu may appear. This menu, called a "context menu," can be disabled through JavaScripts. To prevent them from disabling context menus, deselect this option. {/for} = Allow and block JavaScript on certain domains= JavaScript can be used to do things that some people don't like. For better control, you can install [https://addons.mozilla.org/firefox/search/?tag=privacy privacy extensions] such as: * [https://addons.mozilla.org/firefox/addon/noscript NoScript]: allows JavaScript and other content to run only on websites of your choice. * [https://addons.mozilla.org/firefox/addon/ghostery Ghostery]: allows you to block scripts from companies that you don't trust. {for not fx23} <!-- MZ credit --> <br/> <br/> '''''Based on information from [http://kb.mozillazine.org/JavaScript JavaScript (mozillaZine KB)]''''' {/for} <sub>JavaScript® is a trademark or registered trademark of [http://www.oracle.com/us/sun/index.htm Sun Microsystems, Inc.] in the U.S. and other countries. [[Template:ShareArticle|link=http://mzl.la/KYxPJ6]]