Customize settings and preferences
Make Firefox your default browser on Windows
Learn how to make Firefox your default Web browser on Windows 10 and Windows 11.
Last updated: 05/14/2024
Add-on Badges
You’ll know if an extension is being regularly reviewed if it has one of the badges listed in this article.
Last updated: 01/15/2024
Firefox Page Info window
The Firefox “Page Info” window gives you details about the page you're on. You can also use it to change permissions for the website.
Last updated: 08/01/2023
Firefox options, preferences and settings
Settings panels give you access to Firefox settings. This article describes what types of settings are available in each panel.
Last updated: 03/10/2024
Does Firefox share my location with websites?
Learn what information Firefox sends to web sites about your location and how to use and manage location-aware features of your browser.
Last updated: 09/07/2023
Customize Firefox controls, buttons and toolbars
You can customize Firefox in many ways. This article explains how to customize Firefox controls, buttons and toolbars.
Last updated: 02/08/2024
Firefox Browser welcome pages - helping you get more from Firefox products and services
When you open Firefox after reaching a certain user milestone, you’re shown a Firefox Browser welcome page in a new tab. Learn more.
Last updated: 11/02/2022
Make Firefox your default browser
How to make Web links open in Firefox automatically by setting it as the default browser on your computer.
Last updated: 05/14/2024
Open Firefox automatically when you start your computer
Enable Firefox to launch automatically when Windows starts, providing quicker access to your browser and enhancing your browsing experience.
Last updated: 02/19/2024
Automatically fill in credit card and payment method data on Web forms
Manage credit card autofill settings in Firefox version 81 and above.
Last updated: 03/20/2024
Global Privacy Control
How to make Firefox advise websites that you visit not to sell or share your browsing information.
Last updated: 11/22/2023
Connection settings in Firefox
Your organization or Internet Service Provider may offer or require you to use a proxy to connect to the Internet. Learn more.
Last updated: 11/18/2023
Firefox's performance settings
Firefox automatically uses settings that work best with your computer. You can always change these settings.
Last updated: 12/06/2021
Personalized extension recommendations
Learn more about how Firefox occasionally recommends extensions you may find interesting and how to opt-out.
Last updated: 10/01/2022
Manage local site storage settings
Learn about local storage, how to access storage settings, remove site data or set exceptions for websites to store data in Firefox.
Last updated: 2 weeks ago
Multi-Account Containers
Add Container tabs to Firefox with the Multi-Account Containers add-on, to separate your work and personal browsing.
Last updated: 03/01/2024
Change primary email address on Mozilla account
How to change your email address for your Mozilla Account.
Last updated: 10/27/2023
Tips for assessing the safety of an extension
Here are a few tips for assessing the safety of a third party extension.
Last updated: 08/11/2023
Pop-up blocker settings, exceptions and troubleshooting
Learn what pop-up windows are and what settings Firefox has for blocking or allowing them.
Last updated: 08/04/2022
Back up and restore information in Firefox profiles
Firefox stores your personal information and settings in a profile folder. Learn how to back up and restore this important data.
Last updated: 03/15/2024
Automatically fill in your address on web forms
Manage your settings for automatically filling out your address on web forms.
Last updated: 04/15/2024
How to set the home page
Learn how to change what page you see when you first start Firefox, click the home button or open a new window.
Last updated: 03/10/2024
Restore the Menu bar in Firefox
The Firefox Menu bar (File, Edit, View, History, Bookmarks, etc.) may be hidden or missing. Learn how to restore the Menu bar.
Last updated: 12/24/2023
Turn picture-in-picture mode controls on and off
How to hide the picture-in-picture controls
Last updated: 03/20/2023
Manage your extensions using the extensions button in the toolbar
This article describes the new extensions button and how to manage your extensions and their permissions directly from the Firefox toolbar.
Last updated: 07/23/2023
Allow or block media autoplay in Firefox
Firefox prevents media from playing automatically on websites you visit, unless you grant permission. Learn more about this feature.
Last updated: 05/11/2024
Restore previous session - Configure when Firefox shows your most recent tabs and windows
Firefox can restore windows and tabs that were open the last time you used it. Learn how to use and configure it.
Last updated: 08/07/2023
An extension changed my New Tab page or home page
View and disable extensions or add-ons that change the new tab page or home page.
Last updated: 03/10/2024
Recommendations from Firefox
This article describes why and how extension recommendations are made, including how to turn off recommendations.
Last updated: 03/06/2024
How do I restore my tabs from last time?
This article explains the different options you have for opening the tabs and windows you had open the last time you used Firefox.
Last updated: 12/01/2023
Change your default search settings in Firefox
Learn how to change search settings in Firefox, such as your default search engine and whether or not search suggestions are displayed.
Last updated: 04/04/2024
Add the Search bar to your Firefox toolbar
You can search the Web from the address bar or from the New Tab page. You can also add a separate Search bar to Firefox. Learn how.
Last updated: 03/17/2024
How to manage your camera and microphone permissions with Firefox
How to enable or block sites from accessing your camera and microphone on your desktop or mobile device.
Last updated: 02/21/2024
Recovering important data from an old profile
If you need to create a new Firefox profile, find out how to recover your old Firefox data such as bookmarks, history and passwords.
Last updated: 01/18/2024
Add or remove a search engine in Firefox
This article explains how to add or remove the search engines that Firefox uses.
Last updated: 03/20/2024
Use the Firefox Sidebar to access bookmarks, history and synced tabs
The Firefox Sidebar feature lets you access your bookmarks, history and synced tabs conveniently at the click of a button.
Last updated: 11/19/2018
Manage optional permissions for Firefox extensions
Learn how you can manage optional permissions for extensions in the Firefox Add-ons Manager.
Last updated: 03/30/2024
Switching from Chrome to Firefox
Firefox can automatically move bookmarks, passwords, history and other preferences from Chrome without deleting it or interfering with any of its settings.
Last updated: 08/09/2023
Font size and zoom - increase the size of web pages
Zoom is a feature which allows you to increase or decrease either the size of a web page or the size of the text. This article explains how it works.
Last updated: 04/17/2024
View PDF files in Firefox or choose another viewer
You can view PDF files in Firefox with the built-in viewer. You can also choose a different viewer or set Firefox to always ask. Learn more.
Last updated: 03/14/2024
Change the fonts and colors websites use
This article describes how to customize the way you see websites by choosing font styles and colors that will override those used by the websites.
Last updated: 05/11/2024
Use Firefox in another language
How to display Firefox in a different language.
Last updated: 01/08/2023
Manage extension shortcuts in Firefox
Manage your add-on shortcuts through the Manage Preferences menu in about:addons.
Last updated: 07/08/2022
About Picture-in-Picture in Firefox
The Picture-in-Picture feature allows you to pop videos out of their webpage, so you can watch while continuing to work in other tabs.
Last updated: 05/05/2024
Cannot remove an add-on (extension or theme)
This article describes how to uninstall an extension or theme that can't be removed normally. This includes problematic toolbars and search bars.
Last updated: 07/02/2022
Change website appearance settings in Firefox
Change Firefox settings to adjust the appearance of the websites you visit.
Last updated: 04/03/2023
How do I use the Firefox spell checker?
Firefox's spell checker streamlines writing by auto-detecting errors, offering quick fixes, and custom dictionary additions for flawless text.
Last updated: 02/09/2024
Accessibility features in Firefox - Make Firefox and web content work for all users
Learn about features that make Firefox and web content accessible if you have vision problems or limited ability to use a keyboard or mouse.
Last updated: 04/07/2024
Choose display languages for multilingual web pages
How to choose your preferred languages for multilingual web pages.
Last updated: 01/22/2019
How to disable the Enterprise Roots preference
How to disable the Enterprise Roots preference to fix TLS connection errors caused by antivirus software, without compromising security.
Last updated: 06/05/2022
Use bookmark folders to organize your bookmarks
Firefox allows you to group your bookmarks into folders to organize them by topic or task, etc. This article explains how to organize your bookmarks this way.
Last updated: 03/09/2021
Manage file types and download actions in Firefox
Learn how Firefox handles files with different content types and how to change what Firefox does when you click on or download a file.
Last updated: 03/07/2024
Tab preferences and settings
This article explains the Firefox settings available for managing your tabs.
Last updated: 07/17/2023
Share data with Mozilla to help improve Firefox
The Telemetry feature sends us performance and usage data to help measure how Firefox behaves in the real world and improve it. Learn more.
Last updated: 05/01/2020
Control audio or video playback with your keyboard
This page explains the technical documentation on how to control media in Firefox by using the Media Session API.
Last updated: 08/21/2021
How to restore a browsing session from backup
There are special situations where a browsing session may be lost. This article will show you how to recover your lost session.
Last updated: 12/30/2023
Disable or re-enable Pocket for Firefox
The Pocket save and recommendations features are included with Firefox by default. Learn how to disable or remove Pocket from Firefox and how to re-enable it.
Last updated: 2 weeks, 5 days ago
What if I'm locked out of Two-Step Authentication?
Disable two-step authentication or use a backup authentication code to regain access to your account if you've been locked out of two-step authentication login.
Last updated: 11/04/2023
Dedicated profiles per Firefox installation
Different Firefox installations now use a separate profile to store your bookmarks, passwords and other settings. Learn more.
Last updated: 10/24/2023
Secure Firefox passwords with device sign-in
Learn more about this Firefox anti-snooping feature designed to protect your logins and passwords from unauthorized access.
Last updated: 06/11/2024
Firefox starts automatically when I restart Windows
If Firefox was open when Windows shut down, Firefox may reopen automatically the next time you start Windows. You can disable this feature.
Last updated: 06/06/2022
JavaScript settings and preferences for interactive web pages
This article describes what JavaScript is and how to allow or block it on certain websites.
Last updated: 06/06/2022
Change the program used to open email links
Learn how to change the email program that Firefox opens when you click a “mailto” link, or use the “Email Link” and “Email Image” features.
Last updated: 12/11/2023
HTML5 audio and video in Firefox
Firefox can handle audio and video content on web pages and can open some media files. Learn about supported formats and managing playback.
Last updated: 05/12/2024
Change your Mozilla account password
How to change your Mozilla account password if you detect strange activity on your account.
Last updated: 10/28/2023
Built-in themes in Firefox - alternative to complete themes
How to enable Firefox's built-in themes.
Last updated: 11/25/2022
Block and unblock websites with parental controls on Firefox
This article explains how to block websites or filter website content in Firefox that may be offensive or inappropriate for children.
Last updated: 08/11/2022
Customize your New Tab page to hide or display content
Learn how to show or hide content on your Firefox New Tab page, such as changing which sections to display or showing a blank new tab page.
Last updated: 1 week, 3 days ago
Access hidden tabs in Firefox
Firefox lets you know when there are tabs hidden in the background so you can access them easily.
Last updated: 07/03/2018
Disable high contrast mode in Firefox
How to disable high contrast mode if it's causing problems on some web pages.
Last updated: 07/17/2023
Importing Safari data into Firefox
Import data from your Safari browser into Firefox. You must enable Full Disk Access on macOS version 10.14 (Mojave).
Last updated: 07/26/2023
Access your add-ons with a Mozilla account
The addons.mozilla.org (AMO) site is using Mozilla accounts to offer a more integrated experience across all Mozilla services and products.
Last updated: 11/28/2023
Print simplified, clutter-free pages in Firefox
Firefox lets you print pages in a simplified format that strips away clutter like buttons, ads, and background images. Learn more.
Last updated: 07/21/2021
Feed reader replacements for Firefox
Firefox's built-in support for web feeds and Live Bookmarks ended in December 2018 with version 64. Learn more and find alternatives.
Last updated: 12/19/2019
Assign shortcuts to search engines
How to search faster with search shortcuts.
Last updated: 04/03/2024
Drag and Drop errors with Firefox Launcher Process enabled and Windows UAC disabled - How to Fix
How to fix Firefox drag-and-drop errors when running Windows as Administrator with UAC disabled and the Launcher Process enabled.
Last updated: 07/18/2020
Review installed extensions
Reviewing the extensions you have installed periodically can make it harder for malicious extensions to put your security and privacy at risk.
Last updated: 07/01/2019
Sync logins in Firefox desktop
How to enable sync for logins and passwords on Firefox desktop
Last updated: 03/19/2024
Configuring Networks to Disable DNS over HTTPS
At Mozilla, we believe that DNS over HTTPS (DoH) is a feature that everyone should use to enhance their privacy. Learn more.
Last updated: 04/16/2022
Changing your two-step authentication device for your Mozilla account
What to do if you have two-factor authentication (2FA) setup on your account and need to migrate to a new device or phone.
Last updated: 10/23/2023
Firefox Notes status
Learn more about the discontinuation of Firefox Notes on November 1, 2020.
Last updated: 09/20/2020
End of support for Adobe Flash
Like other browsers, Firefox has ended support for Adobe Flash. Learn about the details here.
Last updated: 03/06/2021
Personalize Firefox with colorways
Personalize your browsing experience with Colorways themes for Firefox, created in partnership with an industry color specialist.
Last updated: 04/11/2024
How file downloads are handled in Firefox version 98 and above
This article describes changes to how downloads are handled in Firefox 98 and above and answers some frequently asked questions.
Last updated: 09/06/2022
Bookmarks Toolbar - Display your favorite websites at the top of the Firefox window
Learn how to use the Bookmarks toolbar in Firefox for quick access to often-used bookmarks.
Last updated: 2 days, 19 hours ago
Restore the default Smart Bookmarks Folders
Learn how to restore the default Most Visited or Recent tags "Smart Bookmarks" folders if you deleted them.
Last updated: 06/06/2022
Search with the Firefox address bar
Learn how the address bar makes it easy to search the Web, find bookmarks or pages you visited before, use search engines and more.
Last updated: 3 days, 15 hours ago
Closing multiple Tabs - option to disable warning
Firefox warns when multiple tabs are closed, there is an option to disable this warning if not required
Created: 10/26/2012
How to disable the built-in PDF viewer and use another viewer
Firefox has a built-in PDF viewer. We'll show you how to disable it and use another PDF viewer, like Adobe Reader, instead.
Last updated: 05/29/2020
Cliqz Recommendations in Firefox
Learn about Cliqz recommendations in Germany.
Last updated: 04/20/2018
Through the Looking Glass
Learn more about Firefox's collaboration with Mr. Robot on a shared experience.
Last updated: 12/19/2017
How is Facebook Container different from Multi-account Containers?
The difference between Facebook Container and Multi-Account Containers
Last updated: 04/06/2018
How to use collections on addons.mozilla.org
How to create, edit, share, and delete a collection on addons.mozilla.org.
Last updated: 10/24/2023
How to fix Pocket login issues
Learn how to add an exception for Pocket in Firefox, to prevent being prompted to sign in to Pocket when saving to the site.
Last updated: 10/25/2023
DOM events changes introduced in Firefox 66
Firefox 66 introduced DOM events changes for compatibility with legacy content. Learn more.
Last updated: 07/09/2019
Pocket sponsored stories on new tabs
Pocket occasionally partners with select publishers and brands to deliver sponsored stories on the Firefox New Tab page. Learn more.
Last updated: 2 weeks ago
My privacy settings were changed from Custom to Standard
If your Custom settings match the settings in Standard, you will be switched back to Standard. This will not affect your settings.
Last updated: 03/24/2021
Tab context menu
Explore the features available in the tab context menu in Firefox, including options for managing and organizing your tabs.
Last updated: 3 weeks ago
Remove the Other Bookmarks folder from the Bookmarks Toolbar
How to remove the Other Bookmarks folder from the Bookmarks Toolbar in Firefox
Last updated: 06/06/2022
Mozilla Voice Server Proxy Retiring
Mozilla is ending official support for the Mozilla Voice Proxy Server and its related projects. Learn more about the retirement of server and extensions.
Last updated: 02/01/2021
How to configure Close Tab warnings in Firefox
Learn how to enable or disable the close tab warning that shows when you're about to close multiple tabs, in Firefox version 94 and above.
Last updated: 11/03/2021
Site Permission Add-ons
Sites can ask to install permission add-ons that modify Firefox’s default security behavior to give them extra privileges. Learn more.
Last updated: 01/02/2023
