Feeds panel

Feeds are specially formatted documents which summarize the content of websites. For example, a feed might summarize the latest news headlines from a news site or the latest posts on a blog. You can view the content of feeds in Firefox, create Live Bookmarks for them, or add them to a feed reader on your computer or on the Web. The optionpreference in this pane determine what Firefox does when you view a feed. For more information, see Options window - Feeds panel.

Applications panel

The Applications panel lets you decide how Firefox should handle different types of files (e.g. PDF documents or audio files). It shows you a list of content types and lets you select an action for each type, such as opening with an application, opening in Firefox using a plugin, or saving the file. For more information, see Options window - Applications panel.

The Advanced panel contains many optionspreferences that are less likely to be used by most people but are useful and sometimes critical optionspreferences for some people. For more information, see Options window - Advanced panel.

The Advanced panel contains optionspreferences for settings that aren't used that often, such as checking to see if Firefox is the default browser, clearing the disk cache, settings for Firefox updates, and various advanced settings that only certain people may need. For more information, see Options window - Advanced panel.