Settings

Manage and customize your product experience with settings, add-ons, and more.

In English

Make Firefox your default browser on Windows

About Add-on Badges

Change Firefox options, preferences and settings

Thunderbird and Junk / Spam Messages

Customize items on your Firefox New Tab page

Make Firefox your default browser

Firefox Password Manager - Alerts for breached websites

Customize Firefox controls, buttons and toolbars

Manage local site storage settings

Connection settings in Firefox

Web Push notifications in Firefox

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

View site information with Page Info

Firefox's performance settings

Pop-up blocker settings, exceptions and troubleshooting

Sponsors on the home page and New Tab page

Recover lost or missing Bookmarks

How to manage your camera and microphone permissions with Firefox

Watch DRM content on Firefox

Personalized extension recommendations

Filelink for Large Attachments

Scan QR codes in Firefox for iOS

Import data from another browser

Global Privacy Control

Back up and restore information in Firefox profiles

Firefox translation for Android

Manage marketing data settings in Firefox for Android

Export Firefox bookmarks to an HTML file to back up or transfer bookmarks

Allow or block media autoplay in Firefox

How to set the home page

Compacting folders

Multi-Account Containers

Restore bookmarks from backup or move them to another computer

JavaScript settings and preferences for interactive web pages

Restore the Menu bar in Firefox

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

Manage my default search engines in Firefox for Android

How to set up Firefox Sync in Firefox for Android

Quick actions in the Firefox search bar

Use the sidebar to access tools and vertical tabs

Import settings and data into Thunderbird

Restore previous session - Configure when Firefox shows your most recent tabs and windows

Bookmarks Toolbar - Display your favorite websites at the top of the Firefox window

Automatically fill in your address on web forms

Turn picture-in-picture mode controls on and off

Choose your preferred PDF viewer in Firefox

Refresh Firefox - reset add-ons and settings

Thunderbird and Gmail

Open Firefox automatically when you start your computer

Control whether Firefox automatically fills in forms

Recommendations from Firefox

Block generative AI features with Firefox AI controls

Import bookmarks and other data from Google Chrome

The difference between IMAP and POP3

Usernames and passwords are not saved

Manage file types and download actions in Firefox

Find and install extensions on Firefox for Android

Use Firefox in Full Screen mode

Manage Firefox search settings

An extension changed my New Tab page or home page

Import settings and data into Thunderbird for Android

Sync bookmarks, tabs, history, and passwords on Android

Manage Firefox updates

Customize Date and Time formats in Thunderbird

Font size and zoom - increase the size of web pages

Manage your extensions using the extensions button in the toolbar

Signatures

Add the Search bar to your Firefox toolbar

How to disable the Enterprise Roots preference

Add or remove a search engine in Firefox

Manage notifications in Firefox for Android

Getting Started with the Thunderbird main window (Supernova and newer)

Message threading in Thunderbird - keep messages grouped by conversation

Use Firefox VPN in Firefox

Thunderbird add-ons - frequently asked questions

Tips for assessing the safety of an extension

Choose display languages for multilingual web pages

Setup your email account for using End-To-End Encryption

On-device AI models in Firefox

Customize keyboard shortcuts in Firefox

Switch from Chrome to Firefox

Why does Mozilla disable some add-ons from running in Firefox?

Profile Manager - Create and remove Thunderbird profiles

Gmail and Thunderbird for Android

Import Bookmarks from an HTML file

How do I restore my tabs from last time?

Customize Firefox Home on iOS

Legacy browser support extension for Windows

Thunderbird and Exchange

Extension data collection

Cannot remove an add-on (extension or theme)

Use the Firefox Sidebar to access bookmarks, history, passwords and synced tabs

Add-ons in Firefox for iOS

Control audio or video playback with your keyboard

How to opt out of studies on Firefox for Android

How to restore a browsing session from backup

Get started with Thunderbird

Configure push email for Thunderbird for Android

Change the fonts and colors websites use

Switch from POP to IMAP account

How to change the Thunderbird layout

Import login and password data from a file

Compact mode workaround in Firefox

Use bookmark folders to organize your bookmarks

Use Firefox in another language

Customize the Firefox home screen

About Picture-in-Picture in Firefox

How do I change my DNS settings?

Appearance Panel - Layout, Message List, Card View, Table View, Sorting and Threading settings

Tab preferences and settings

FAQ Changing IMAP to POP

Installing an Add-on in Thunderbird

Customize Firefox using policies.json

Firefox Translations

Customize your Firefox app icon on iOS

Reset Firefox preferences to troubleshoot and fix problems

How do I use the Firefox spell checker?

Scan QR codes in Firefox for Android

Install themes to change the look of Thunderbird

Manage extension shortcuts in Firefox

Use multiple profiles in Thunderbird

Access your add-ons with a Mozilla account

Manage optional permissions for Firefox extensions

Firefox Suggest for Mobile

Get started with the Mozilla VPN extension

Import Bookmarks and other data from Microsoft Edge

Display the Thunderbird menus and toolbar

Manage saved passwords in Firefox for iOS

Add a search engine to Firefox Focus for Android

Autocomplete settings in the Firefox Focus address bar

Print simplified, clutter-free pages in Firefox

Customize Firefox using Group Policy (Windows)

Search suggestions in Firefox Focus for iOS

Protect your container tabs with Mozilla VPN

Firefox for Enterprise Kiosk mode

How to pin and unpin Firefox from the taskbar on Windows 10 and Windows 11

Set Firefox for Android to open links in native apps

Change website appearance settings in Firefox

Getting started with Thunderbird for Android

Changes to toolbars and window sizes are not saved

Change the program used to open email links

Change the default language of Firefox for Android

IMAP Synchronization

Configuration Options for Accounts

Thunderbird makes unrequested connections

How to reset the default user agent on Firefox

Maildir in Thunderbird

Set a homepage in Firefox for iOS

Getting started with the Thunderbird main window

Set up Certificate Authorities (CAs) in Firefox

Collections in Firefox

Change your two-step authentication device for your Mozilla account

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

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

Importing Safari data into Firefox

Multi-Hop - Encrypt your data twice for enhanced security while using Mozilla VPN

Site Permission Add-ons

Thunderbird Mobile Telemetry

Block and unblock websites with parental controls on Firefox

Export bookmarks to Safari

Audio and video files in Firefox

How do I change to the desktop view in Firefox for Android?

How to disable or change the Thunderbird start page

Enable or disable search engines on Firefox for iOS

Change the default language on Firefox for iOS

Set Firefox as the default browser for iOS

Autocomplete web addresses in the URL bar in Firefox Focus for iOS

Add search engines in Firefox Focus for iOS

How to add the translate add-on to Firefox

Change themes in Firefox for iOS

Firefox starts automatically when I restart Windows

Add trusted websites to your allow list in Firefox Focus

Assign shortcuts to search engines

Drag and Drop errors with Firefox Launcher Process enabled and Windows UAC disabled - How to Fix

Personalize Firefox with colorways

HTTPS-Only Mode in Firefox Focus for Android

Change your location for a specific website

How to fix preferences that won't save

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

How do I quit Firefox for Android?

Creating a Newsgroup Account

Make Thunderbird the Default Mail Client

Message List Columns

How to Customize the New Mail Sound

How to Subscribe to News Feeds and Blogs

Instant Messaging and Chat

Uninstall Firefox for Android extensions

Manage saved passwords in Firefox for Android

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

Turn search suggestions on or off on Firefox for iOS

Remove a search engine in Firefox Focus for Android

How is Facebook Container different from Multi-account Containers?

Customize Firefox using AutoConfig

Access hidden tabs in Firefox

Feed reader replacements for Firefox

Firefox Focus main Menu

Privacy settings in Firefox for Enterprise

Review installed extensions

Playing videos in Firefox for Android

Tab context menu

Grant camera access to Firefox for Android

Unable to uninstall add-ons (extensions or themes)

How to opt out of studies on Firefox for iOS

How to configure Close Tab warnings in Firefox

View bookmarks on your home screen

Choose your opening screen for Firefox for iOS

My default search engine changed after updating Firefox

How to move the address bar in Firefox for iOS

Change your wallpaper in Firefox for iOS

Change your wallpaper in Firefox for Android

Enable light or dark mode in MDN

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

Install the Firefox Relay extension in Firefox for Android

How do I change my Privacy features?

Unified Toolbar

Global Privacy Control in Firefox for Android

Access AI chatbots in Firefox

New in Thunderbird for Android version 8

A program on your computer interferes with the Mozilla VPN extension

Manage your Monitor notifications

Stop screen brightness from dimming in Thunderbird for Android

How to search IMDB, Wikipedia and more from the address bar

Restore the default Smart Bookmarks Folders

Firefox doesn't save web form entries

Share data with Mozilla to help improve Firefox

Closing multiple Tabs - option to disable warning

How to disable the built-in PDF viewer and use another viewer

Using Dark Theme in Firefox for Android

Names but no Email Addresses are Displayed

Configuration Options for Identity

Configuration Options for Tags

Configuration Options for Attachments

Certificates

Config Editor

Block a sender

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

Installing Thunderbird on Ubuntu Linux

Add Search Engine to Open Search

Installing and Using another Language in the Dictionary

How to Customize Toolbars

Get help with Firefox Developer Edition

Thunderbird and Logjam

Customize your New Tab page to hide or display content

Save passwords in Firefox for Android

Voice input in Firefox for Android

Add Firefox to the Today view on your iOS device

Re-enable multi-process support disabled by Windows utilities

Change the default email program in Firefox for iOS

Set Firefox Focus as default browser on Android

Built-in themes in Firefox - alternative to complete themes

New Tab settings in Firefox for iOS

File system paths on Linux are always treated as UTF-8

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

Privacy panel - Remote content and cookie settings in Thunderbird

How to replace Google Assistant with a Firefox search

Facebook Container isn't working

Block cookies in Firefox Focus for Android

How to use collections on addons.mozilla.org

Debugging policy issues

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

Manage policies on macOS desktops

Disable high contrast mode in Firefox

Dedicated profiles per Firefox installation

Enforce policies on Firefox for Enterprise

See active policies on Firefox for Enterprise

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

Managing policies on Linux desktops

Will policies I set work if users already installed Firefox?

Make Firefox for Enterprise the default browser

Firefox Browser welcome pages - helping you get more from Firefox products and services

Dangerous directories

Customize Firefox on macOS using configuration profiles

Using Dark Theme in Firefox for iOS

My privacy settings were changed from Custom to Standard

Manage Firefox with Microsoft Endpoint Manager (Intune)

Turn push notifications on or off in Firefox for iOS

Add a Firefox widget to your Home screen

Use Web Apps with Firefox for Android

Auto-close open tabs in Firefox for Android

End of support for Adobe Flash

Remove the Other Bookmarks folder from the Bookmarks Toolbar

Mozilla Voice Server Proxy Retiring

View and control data collected by Mozilla VPN

Text Encoding no longer available in the Firefox menu panel

Automatically fill in credit card information on Firefox for Android

OpenPGP Recipient Alias Configuration

Set Firefox as your default browser from the notification panel on Android

Exclude applications from Mozilla VPN protection

Set Firefox Focus as the default browser for iOS

View recently saved bookmarks from your homepage on Firefox for iOS

Change your theme in Firefox Focus for Android

Change your theme in Firefox Focus for iOS

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

Install the Firefox Relay extension on Firefox for desktop

View articles recommended by Pocket on your Firefox for iOS homepage

Add a search engine to Firefox klar for Android

Remove a search engine in Firefox Klar for Android

Autocomplete settings in the Firefox Klar address bar

How file downloads are handled in Firefox

Receive only important emails sent through your masks with Firefox Relay Premium

Change site permissions in Firefox Focus for Android

Change site permissions in Firefox Klar for Android

Recommended Firefox privacy and security settings for families

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

Manage your Mozilla account newsletter and email preferences

How do I block phone calls or texts to my Relay Phone mask?

Mozilla VPN message center

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

Explore by product

Explore by topic

Browse by product

Browse all forum threads by topic

Get help with

Search Support

In English