This document explains all of the optionspreferences available in the OptionsPreferences window of Mozilla Firefox. At the top of the Firefox window, click on the Firefox button and then select OptionsAt the top of the Firefox window, click on the Tools menu and then select OptionsOn the menu bar, click on the Firefox menu and select Preferences...At the top of the Firefox window, click on the Edit menu and select Preferences to access the optionspreferences window.

General panel

The General panel contains optionspreferences related to the most commonly used settings, such as what you first see when Firefox starts and how Firefox handles file downloads. For more information, see Startup, home page and download settings.

Tabs panel

The Tabs panel contains optionspreferences related to the tabbed browsing feature. For more information, see Tab preferences and settings.

Content panel

The Content panel contains optionspreferences related to how websites are displayed. For more information, see Settings for fonts, languages, pop-ups, images and JavaScript.

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 Set how Firefox handles different types of files.

Privacy panel

The Privacy panel contains optionspreferences related to your privacy. As you browse the web, information on where you have been, what pages you have visited, etc. are stored here. For more information, see Settings for privacy, browsing history and do-not-track.

Security panel

The Security panel contains optionspreferences related to keeping your web browsing safe. For more information, see Security and passwords settings.

Sync panel

The Sync panel lets you set up or manage a Firefox Sync account. Firefox Sync is a service that lets you synchronize your bookmarks, history, passwords and open tabs with another copy of Firefox – like one on another computer or on a mobile phone. For more information, see Firefox Sync - Take your bookmarks, tabs and personal information with you, Share bookmarks, tabs and more with your other computers, and How do I manage my Firefox Sync account?.

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 Advanced settings for accessibility, browsing, system defaults, network, updates, and encryption.

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