From MozillaZine Knowledge Base

Many webpages contain advertising or other clutter you'd rather not see. These extensions can help you control unwanted content.

Adblock and Adblock Plus

• Adblock lets you specify filters to remove advertising and other unwanted content such as graphics, JavaScript, IFRAMEs and Flash movies. (Home page)
• Adblock Plus blocks unwanted content and supports filter subscriptions or you can write your own filters. (Home page)

For more information, see the Adblock article at Wikipedia. For details on adding filters, see Regular Expressions at MDC.

NoScript

NoScriptallows you to block JavaScript except for sites you specify. Although its main function is to block malicious JavaScript, NoScript also blocks Java, Silverlight, Flash, Quicktime, and other plugin content on untrusted sites. For more information, see NoScript's home page and the NoScript article at Wikipedia.

Other extensions

Other extensions that can remove unwanted webpage content include:

• Stylish
• Remove It Permanently
• Nuke Anything Enhanced
• Greasemonkey
• Aardvark
• DOM Inspector

See also

• Parental controls
• Popups not blocked
• Blocking sites