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What is a User Script, User JavaScript, or JavaScript for that matter?

A UserScript is a browser script stored on your computer which you can edit yourself and allows you to make certain modifications to a webpage, or in some cases even the browser itself.
See also Wikipedia's Greasemonkey and Bookmarklet entries.   note
JavaScript/DOM, or "User JavaScript", allows you to dynamically modify the HTML document.

JavaScript was originally created by Netscape Communications, and was loosely based on Sun's Java. The core JavaScript features were later standardized as ECMAScript and several DOM standards.
See also Mozilla's JavaScript and W3C's Document Object Model Core.

What is Mozilla? What is Mozilla SeaMonkey?

Mozilla was the codename for the original Netscape browser, which was a "Monster" version of NCSA Mosaic - the original web browser. Thus Mozilla is the "Mosaic Killer".
See also the NCSA Mosaic web page.

When Netscape began work on Netscape 5 (Mozilla 5), they eventually decided to scrap the project and start over from scratch, rather than to continue from the Netscape Communicator codebase. So they started over from version 0, with the first official release version being Mozilla 1.0. The codebase name was actually changed to Gecko, all Mozilla applications use the Gecko engine.
Mozilla is now split into The Mozilla Foundation and the Mozilla Corporation.

The Netscape browser eventually added an eMail client, then later a web page editor. Netscape Communicator included a browser, eMail, Usenet, HTML editor, Calendar and other features. Most of these features were included in Mozilla, which was later referred to as the "Mozilla Application Suite". The Mozilla Foundation eventually stopped development on "Mozilla Suite", but some dedicated developers took over the project, renaming it to SeaMonkey or "Mozilla SeaMonkey Suite".
See also the official SeaMonkey Project web site.

What is Greasemonkey? Where can I get it?

Greasemonkey is an extension for Mozilla browsers that allows the user to easily add custom JavaScripts, and whereby the user can control the way specified web sites look and function. This site intends to explain some Greasemonkey features in more detail.
See also the Greasemonkey Wiki pages.

The only version of Greasemonkey that works in Mozilla SeaMonkey is the modified version being maintained by Philip Chee on the Mozdev xSidebar site.
See greasemonkey.mod at xsidebar.mozdev.org.

The official version for Mozilla Firefox can be found on the Add-Ons site.

More User Scripts, and a helpful forum can be found at userscripts.org.

A similar extension, Stylish, which only alters CSS, is available at userstyles.org. This extension should work in all Mozilla browsers without modifications, but check out the site for more info. This site will include some code for Stylish as well.

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Last edit on 2008-07-12