Settings

Add-on Badges

You’ll know if an extension is being regularly reviewed if it has one of the badges listed in this article.

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.

Make Firefox your default browser on Windows

Learn how to make Firefox your default Web browser on Windows 10 and Windows 11.

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.

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.

Customize Firefox controls, buttons and toolbars

You can customize Firefox in many ways. This article explains how to customize Firefox controls, buttons and toolbars.

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.

Thunderbird and Junk / Spam Messages

This article explains how Thunderbird's adaptive filter learns to identify junk mail ("spam").

Automatically fill in credit card and payment method data on Web forms

Manage credit card autofill settings in Firefox version 81 and above.

Firefox's performance settings

Firefox automatically uses settings that work best with your computer. You can always change these settings.

Import settings and data into Thunderbird for Android

How to import email settings from K-9 and Thunderbird for Android

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.

Automatically fill in your address on web forms

Manage your settings for automatically filling out your address on web forms.

Personalized extension recommendations

Learn more about how Firefox occasionally recommends extensions you may find interesting and how to opt-out.

Add-ons in Firefox for iOS

Why Firefox add-ons are unavailable for Firefox on iOS.

Tips for assessing the safety of an extension

Here are a few tips for assessing the safety of a third party extension.

Firefox translation for Android

The built-in translation feature allows you to seamlessly browse the web in your preferred language. Learn more.

Compacting folders

This article explains how Thunderbird stores messages on a disk drive and why it is necessary to periodically compact (purge).

Legacy browser support extension for Windows

Add-ons and older versions of Firefox ESR may enable your users to run legacy add-ons and view websites that require Internet Explorer.

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.

Move the navigation bar to the top or bottom of the app in Firefox for Android

Firefox for Android gives you the option to move the navigation bar to the bottom or top of the app if desired.

Global Privacy Control

How to make Firefox advise websites that you visit not to sell or share your browsing information.

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.

Multi-Account Containers

Add Container tabs to Firefox with the Multi-Account Containers add-on, to separate your work and personal browsing.

Message threading in Thunderbird - keep messages grouped by conversation

Threading is a useful way of displaying message list in Thunderbird with your messages grouped in tree structures by conversations. Here's how to enable it.

Pop-up blocker settings, exceptions and troubleshooting

Learn what pop-up windows are and what settings Firefox has for blocking or allowing them.

Recover lost or missing Bookmarks

If your bookmarks have disappeared, it may be possible to recover them. Learn why bookmarks may seem to be missing and how to get them back.

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.

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.

Filelink for Large Attachments

Messages with large attachments are often rejected by mail servers. Thunderbird can use web-based storage services to send large file attachments.

Turn picture-in-picture mode controls on and off

How to hide the picture-in-picture controls

Export your Thunderbird Profile

Thunderbird's export tool lets you create a backup of your Thunderbird profile including accounts, messages, address books, and settings.

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.

Signatures

This article explains how to create and use custom signatures (text or images that are automatically appended to messages).

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.

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.

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.

Make Firefox your default browser

How to make Web links open in Firefox automatically by setting it as the default browser on your computer.

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.

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.

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.

How to create and use mailing lists on Thunderbird

A mailing list is used to send one email to a group of contacts. This article explains how to create and use mailing lists in Thunderbird.

How to set up Firefox Sync in Firefox for Android

How to enable sync on Firefox for Android to sync your bookmarks, credit cards, history, logins and open tabs across your devices.

JavaScript settings and preferences for interactive web pages

This article describes what JavaScript is and how to allow or block it on certain websites.

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.

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.

Manage my default search engines in Firefox for Android

Firefox for Android lets you add, remove and change your default search engine. Learn to manage your search engines with just a few taps.

Add or remove a search engine in Firefox

This article explains how to add or remove the search engines that Firefox uses.

Switch 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.

Compact mode workaround in Firefox

Learn about a workaround to activate compact mode, if you need to. This feature isn't supported and we still recommend using normal mode.

Customize Date and Time formats in Thunderbird

How to customize date and time formats in Mozilla Thunderbird using regional settings or override preferences.

New in Thunderbird for Android version 8

Introduction to the most interesting new features, improvements, and changes visible to users in Thunderbird for Android version 8.

Archived Messages

This article explains how the "archive" feature of Thunderbird works.

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.

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.

How to opt out of studies on Firefox for Android

Here's how you can opt out of studies on Firefox for Android

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.

Use Firefox in another language

How to display Firefox in a different language.

Recommendations from Firefox

This article describes why and how extension recommendations are made, including how to turn off recommendations.

Auto-close open tabs in Firefox for Android

Learn how Firefox for Android can automatically close tabs after one day, one week or one month.

Manage optional permissions for Firefox extensions

Learn how you can manage optional permissions for extensions in the Firefox Add-ons Manager.

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.

Use multiple profiles in Thunderbird

Thunderbird saves personal information such as messages, passwords and user preferences in a "profile". This article describes how to use multiple profiles.

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.

Customize the Firefox home screen

How to customize the default Firefox home screen

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.

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.

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.

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.

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.

Usernames and passwords are not saved

Firefox has a password management feature to store usernames and passwords for logging in to websites. Learn why logins might not be saved.

Tab preferences and settings

Learn how to customize tab settings in Firefox to enhance your browsing experience.

Manage saved passwords in Firefox for iOS

View, edit or delete saved passwords in Firefox on your iPad, iPhone or iPod touch.

Choose display languages for multilingual web pages

How to choose your preferred languages for multilingual web pages.

Import settings and data into Thunderbird

With Thunderbird's import tool, you can import settings and data from a variety of sources including Thunderbird profiles, other applications or files.

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.

View PDF files using Firefox’s built-in viewer

You can view PDF files directly in Firefox with the built-in viewer. Learn how to use the PDF viewer and how to resolve common problems.

Setting Firefox as the default browser does not work - What to do

Learn how to make sure Firefox is the default browser if setting that option didn't work, or it got changed by another program.

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.

Thunderbird add-ons - frequently asked questions

Add-ons are extensions and other additions that add new functionality to Thunderbird or change its appearance.

Display the Thunderbird menus and toolbar

The menu items File, Edit, View, etc. are located in the menu bar. This article will help you restore a missing menu bar.

Customize Firefox using Group Policy (Windows)

Firefox supports setting policies via Active Directory as well as using Local Group Policy.

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.

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.

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.

Dedicated profiles per Firefox installation

Different Firefox installations now use a separate profile to store your bookmarks, passwords and other settings. Learn more.

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.

Protect your container tabs with Mozilla VPN

Mozilla VPN encrypts your connection so that third parties can't track your online activity. Learn how to add this protection to Containers.

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.

Choose your preferred PDF viewer in Firefox

Learn how to set a different PDF viewer for downloaded files in Firefox instead of using the built-in viewer.

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.

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.

Find and install extensions on Firefox for Android

There are several extensions that you can install to add features to Firefox. Learn how to find, install and manage these add-ons to Firefox for Android.

Hyperlinks in Messages Not Working

When clicking hyperlinks in email, your default web browser should open and display their content. Learn why that may fail and why links may not be clickable.

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.

Access hidden tabs in Firefox

Firefox lets you know when there are tabs hidden in the background so you can access them easily.

Change website appearance settings in Firefox

Change Firefox settings to adjust the appearance of the websites you visit.

Add alt text to images in your PDFs using Firefox

Image alt text is crucial for document accessibility. Learn how to create it manually or with our Firefox AI-powered feature for PDF files.

Config Editor

Using the config editor to view or edit Thunderbird preference settings.

Installing an Add-on in Thunderbird

Add-ons add functionality to Thunderbird or change its appearance. Learn how to install add-ons to Thunderbird.

Scan QR codes in Firefox for Android

Learn how to use the QR code reader in Firefox for Android.

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.

Turn on/off saved logins, login sync and login autofill in Firefox for Android

Learn how to save, sync and access your logins in Firefox for Android

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).

Set Firefox for Android to open links in native apps

Learn how you can set Firefox for Android to automatically open links in native apps.

Change your wallpaper in Firefox for Android

You can change the wallpaper to customize your homepage in Firefox for Android.

Domains to allow for Firefox

This document is primarily intended for Firefox Enterprise users. Making sure the domains listed in this article are allowed by your firewall or other software ensures that Firefox works correctly.

Firefox Suggest for Mobile

Firefox Suggest provides personalized website suggestions as you type in the address bar.

Block links from opening in external apps

Learn how to stop links from automatically opening in external applications.

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.

What to do if you can't download or save files

If you can't download or save files with Firefox, this article explains the steps to take to fix this problem.

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.

FAQ Changing IMAP to POP

If your mail server supports both IMAP and POP, Thunderbird will use IMAP by default. Use these instructions to manually configure a POP account.

How to disable or change the Thunderbird start page

Change the Thunderbird start page to any webpage, or set it to a blank page.

Message List Columns

This article explains how to configure the columns that Thunderbird displays in message lists.

Configuration Options for Accounts

Learn about the Account Settings window including server settings, identities, signatures, and more.

How to Customize the New Mail Sound

Learn how to customize the sound that plays when a new email message is received.

Instant Messaging and Chat

As of Thunderbird 52.x, Thunderbird supports instant messaging and chat using IRC, XMPP, Twitter, and Google Talk

Voice input in Firefox for Android

Learn how to use the voice input feature to speak into the address bar instead of typing text.

Security panel - Junk, scam, antivirus, and password settings in Thunderbird

Learn about the Security panel of the Thunderbird Options/Preferences window including junk mail control, scam detection, antivirus integration, and passwords.

Customize Firefox using AutoConfig

How to use AutoConfig files to set and lock preferences that are not covered by Firefox policies.

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.

Install themes to change the look of Thunderbird

A theme is a type of add-on which changes the visual appearance of Thunderbird. Learn how to find, install, and manage themes within Thunderbird.

Assign shortcuts to search engines

How to search faster with search shortcuts.

Manage extension shortcuts in Firefox

Manage your add-on shortcuts through the Manage Preferences menu in about:addons.

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.

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.

Collections in Firefox

Learn how to use the Collections feature.

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.

Firefox for Enterprise Kiosk mode

Kiosk mode locks down Firefox in order to protect the kiosk from users. Learn more.

Manage Firefox with Microsoft Endpoint Manager (Intune)

How to manage Firefox Enterprise with Microsoft Endpoint Manager (Intune).

Tab context menu

Explore the features available in the tab context menu in Firefox, including options for managing and organizing your tabs.

Remove the Other Bookmarks folder from the Bookmarks Toolbar

How to remove the Other Bookmarks folder from the Bookmarks Toolbar in Firefox

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.

How file downloads are handled in Firefox

This article describes changes to how downloads are handled and answers some frequently asked questions.

Change your wallpaper in Firefox for iOS

You can change the wallpaper to customize your homepage in Firefox for iOS.

Unified Toolbar

Intro to the Unified Toolbar and how to customize the buttons for the different toolbars for: Mail, Address Book, Calendar, Tasks, Chat and Settings "Spaces."

Thunderbird Android Telemetry

This article describes controlling data that may be collected by Thunderbird for Android, to help improve performance and stability.

Using Dark Theme in Firefox for Android

You can change the look of your Firefox app at any time by selecting between Light and Dark mode.

How do I quit Firefox for Android?

Add the Quit option to your menu to automatically delete your browsing history and close all tabs every time you exit the app.

Names but no Email Addresses are Displayed

I can only see the message sender's name, not address!

How to Customize Toolbars

This article explains how to customize the position and contents of Thunderbird toolbars.

Enable or disable search engines on Firefox for iOS

Learn how to enable or disable search engines from Firefox in your iPhone or iPad.

Manage saved passwords in Firefox for Android

Learn how to change or remove saved login information in Firefox for Android.

Customize Firefox Home on iOS

Firefox Home on your iOS device displays your shortcuts, your library, recently visited tabs, recently saved bookmarks and Pocket article recommendations.

Change the default language on Firefox for iOS

How to switch to another default language on Firefox for iOS.

Scan QR codes in Firefox for iOS

Learn about the QR code reader in Firefox for iOS.

Built-in themes in Firefox - alternative to complete themes

How to enable Firefox's built-in themes.

How is Facebook Container different from Multi-account Containers?

The difference between Facebook Container and Multi-Account Containers

Customize Firefox using policies.json

Cross-platform policy support can be implemented using a JSON file called policies.json.

Debugging policy issues

This article will help you figure out problems with policies not applying.

Unable to install add-ons (extensions or themes) in Thunderbird

This article describes various reasons that would cause an add-on not to be able to be installed and what you can do to fix the issue.

Manage Firefox updates

Learn about automatic updates for Firefox deployments and how to ensure that the latest security patches are applied and all features are available.

See active policies on Firefox for Enterprise

How to see what policies you have active on a desktop computer.

Sync logins in Firefox desktop

How to enable sync for logins and passwords on Firefox desktop

Dangerous directories

Some system folders are not allowed when setting Thunderbird storage location as they cause issues.

Playing videos in Firefox for Android

Firefox for Android gives you lots of options for playing video and audio on your phone, including background playback and auto-play settings.

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.

Manage notifications in Firefox for Android

Learn how to control which notifications you receive from Firefox for Android.

Primary Password is replacing Master Password in Thunderbird

Primary Password is replacing Master Password. Learn more about why we are making this change.

View recently saved bookmarks from your homepage on Firefox for iOS

View your recently saved bookmarks and reading list items on your homepage in Firefox for iOS.

View bookmarks on your home screen

You can access your bookmarks and recent searches from your Firefox for Android home screen.

Personalize Firefox with colorways

Personalize your browsing experience with Colorways themes for Firefox, created in partnership with an industry color specialist.

Upgrading from an older version of Thunderbird

This article will help you upgrade old versions of Thunderbird to the latest version.

New in Thunderbird 115 Supernova

Detailed introduction to the most interesting new features, improvements, and changes visible to users in Thunderbird 115.0 Supernova.

Global Privacy Control in Firefox for Android

How to make Firefox for Android advise websites that you visit not to sell or share your browsing information.

Multiwindow support on iPad for Firefox

Learn how to use Firefox in multiple windows on your iPad for better multitasking and productivity.

Configure push email for Thunderbird for Android

How to setup push email for selected folders for Thunderbird for Android

Restore the default Smart Bookmarks Folders

Learn how to restore the default Most Visited or Recent tags "Smart Bookmarks" folders if you deleted them.

How to fix preferences that won't save

This article tells you how to fix issues where Firefox can't save some or all of the settings that you try to change.

Changes to toolbars and window sizes are not saved

If Firefox doesn't remember changes you've made to toolbar customizations or to browser window size or position, this article has solutions.

Firefox doesn't save web form entries

Firefox's autocomplete feature lets you save and reuse text field entries in web forms. If you're no longer able to auto-fill your forms, follow these steps.

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.

Change the default language of Firefox for Android

Learn how to change the default language on Firefox for Android.

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

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.

Creating a Newsgroup Account

Thunderbird can be used to read messages from and write messages to Usenet newsgroups.

Configuration Options for Identity

This page describes Thunderbird's configuration options that affect your identity.

Configuration Options for Tags

This page describes Thunderbird's configuration options as they relate to tagging messages.

Configuration Options for Attachments

This page describes Thunderbird's configuration options for attachments.

Certificates

Block a sender

How to Install and Use another Language in the Dictionary on Thunderbird

How to install and use additional language dictionaries on Thunderbird.

Installing Thunderbird on Ubuntu Linux

Open Search

Instantly take part of a message and search for it in Bing, Yahoo, Twitter or other websites.

How to Subscribe to News Feeds and Blogs

An introduction to RSS feeds, and instructions on how to use them in Thunderbird.

Installing and Using another Language in the Dictionary

Uninstall Firefox for Android extensions

How to uninstall Firefox for Android add-ons/extensions

Save passwords in Firefox for Android

How to enable or disable saved logins in Firefox for Android.

Set Firefox as the default browser for iOS

In iOS 14+ you can now change your default browser. Learn how to change your default browser or other options for older versions.

Add Firefox to the Today view on your iOS device

Add the Firefox widget to the Today view on your iPhone, iPad or iPod touch to open new tabs or access copied links quickly.

Set a homepage in Firefox for iOS

How to set a URL for your home page, accessed from the Homepage option in the menu.

Change the default email program in Firefox for iOS

Change your default mail app in Firefox for iOS.

Advanced panel - System, network, updates, and other advanced settings in Thunderbird

Learn about the Advanced panel of the Thunderbird Options/Preferences window including scrolling, system integration, network, update, certificates, etc.

Cliqz Recommendations in Firefox

Learn about Cliqz recommendations in Germany.

Turn search suggestions on or off on Firefox for iOS

How to turn search suggestions on or off.

New Tab settings in Firefox for iOS

Customize your New Tab settings.

Privacy panel - Remote content and cookie settings in Thunderbird

Learn about the Privacy & Security options in Thunderbird (mail/web content, cookies, passwords, junk/spam detection, data collection, antivirus, certificates).

How to replace Google Assistant with a Firefox search

Make Firefox search replace Google Assistant.

Change themes in Firefox for iOS

Learn how to switch between light and dark themes on Firefox for iOS.

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.

How to use collections on addons.mozilla.org

How to create, edit, share, and delete a collection on addons.mozilla.org.

Manage policies on macOS desktops

Starting with Firefox 64 and Firefox ESR 60.4, Firefox supports configuration files on macOS.

Disable high contrast mode in Firefox

How to disable high contrast mode if it's causing problems on some web pages.

Privacy settings in Firefox for Enterprise

How to disable features for minimize information sent to Mozilla.

Enforce policies on Firefox for Enterprise

Types of policy engines for Firefox for Enterprise.

Where can I find a list of policies for Firefox for Enterprise?

Where to find policies for Windows, Mac and Linux.

Managing policies on Linux desktops

How to manage policies on Linux desktops.

Will policies I set work if users already installed Firefox?

Policy support for Firefox is implemented using Group Policy.

Make Firefox for Enterprise the default browser

Learn how to configure the computers in your domain to use Firefox for Enterprise as the default browser.

Set up Certificate Authorities (CAs) in Firefox

Learn how to set up certificate authorities (CAs) for your organization in Firefox for Enterprise.

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.

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.

Customize Firefox on macOS using configuration profiles

On MacOS, Firefox supports customizing policies via a properties list file or .plist file that can be converted to a configuration profile. Learn more.

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.

Turn push notifications on or off in Firefox for iOS

How to enable or disable push notifications for Firefox on your iPad, iPhone or iPod.

Add a Firefox widget to your Home screen

Learn more about how to add a Firefox widget to your Home screen.

Grant camera access to Firefox for Android

How to grant camera access so Firefox can scan a QR code.

Use Web Apps with Firefox for Android

Learn more about Web apps and how to use them with Firefox for Android.

End of support for Adobe Flash

Like other browsers, Firefox has ended support for Adobe Flash. Learn about the details here.

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.

Unable to uninstall add-ons (extensions or themes)

This article describes how to uninstall an extension or theme that can't be removed normally.

How to opt out of studies on Firefox for iOS

Here's how you can opt in or out of studies on Firefox iOS

View recent tabs on your Firefox for iOS homepage

You can view your recent tabs on your homepage in Firefox for iOS under the Jump Back In section.

View recent tabs on your Firefox for Android homepage

View your recent open tabs on your Firefox for Android homepage.

View articles recommended by Pocket on your Firefox for Android homepage

You can view articles and topics recommended by Pocket on your Firefox for Android homepage.

The language of the websites I visit changes when I turn Mozilla VPN on - What to do

This article explains what to do if the language of the websites you visit changes when you use Mozilla VPN

View articles recommended by Pocket on your Firefox for iOS homepage

You can view articles and topics recommended by Pocket on your Firefox for iOS homepage.

Choose your opening screen for Firefox for iOS

Choose what you see when you return to the Firefox for iOS app.

How to move the search bar in Firefox for iOS

The search bar in Firefox for iOS will appear at the bottom of the screen by default. However, you can choose to move it to the top of the screen instead.

New in Thunderbird 102

Detailed introduction to the most interesting new features, improvements, and changes visible to users in Thunderbird 102.0.

Automatically fill in your address on web forms in Firefox for Android

Manage your settings for automatically filling out your address on web forms in Firefox for Android

Manage your Mozilla account newsletter and email preferences

Change your email preferences to receive the emails that are of most interest to you, or to unsubscribe from email communications.

How to disable the Firefox Relay autofill icon on online fields and websites

The Relay integration with Firefox Password Manager makes a shortcut icon appear next to email fields on websites. Learn how to disable it.

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.

What should I do if I'm redirected to the Firefox Relay FAQ when clicking a link within an email?

After enabling the Remove email trackers Firefox Relay option, certain links in forwarded emails may redirect to our FAQ page. Learn more.

Autofill Credit Cards in Firefox for iOS

Streamline your online shopping with Firefox for iOS Credit Card and Payment Method Autofill. Learn more.

Address autofill on Firefox

Experience the seamless Address Autofill in Firefox iOS, simplifying address entry on websites.

Enable or disable Local Network Access on iOS

LAN Bypass allows you to control whether or not your device can access devices on the local network while the VPN is on. Examples of these can be your network printer, your smart TV, AirDrop and CarPlay.

Choose which browser opens Pocket web content on your Android

Pocket for Android lets you choose which browser to open web content with when viewing articles. Follow these steps to select your preferred browser for a smoother reading experience.

Notifications in Thunderbird

This allows Mozilla to push important, time-sensitive notifications to users. These notifications are scheduled based on version, OS and locale.

Wrong home page opens when I start Firefox - How to fix

Learn how to restore your home page if a third-party software vendor changes it so that their page always opens when you launch Firefox.

Make Firefox the default browser on Android

This article explains how to set Firefox as your default browser on your Android device.