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 Firefox 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.

Firefox Firefox Last updated: 08/01/2023

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.

Firefox, Privacy and Security Firefox, Privacy and Security Last updated: 09/07/2023

Make Firefox your default browser

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

Firefox Firefox Last updated: 05/14/2024

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.

Firefox Firefox Last updated: 2 weeks, 6 days ago

Firefox translation for Android

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

Firefox for Android Firefox for Android Last updated: 05/20/2024

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.

Firefox Firefox Last updated: 11/18/2023

Global Privacy Control

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

Firefox Firefox Last updated: 11/22/2023

Firefox's performance settings

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

Firefox Firefox Last updated: 12/06/2021

Add-ons in Firefox for iOS

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

Firefox for iOS Firefox for iOS Last updated: 05/17/2019

Multi-Account Containers

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

Firefox Firefox Last updated: 03/01/2024

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.

Firefox Firefox 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.

Firefox Firefox Last updated: 12/24/2023

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.

Thunderbird Thunderbird Last updated: 12/03/2023

Compacting folders

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

Thunderbird Thunderbird Last updated: 08/09/2021

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.

Firefox Firefox Last updated: 05/11/2024

Recommendations from Firefox

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

Firefox Firefox Last updated: 03/06/2024

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.

Firefox for Android, Firefox Lockwise, Mozilla Account Firefox for Android, Firefox Lockwise, Mozilla Account Last updated: 12/29/2023

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.

Firefox Firefox Last updated: 12/01/2023


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

Thunderbird Thunderbird Last updated: 05/24/2022

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.

Firefox Firefox Last updated: 08/09/2023

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.

Firefox Firefox Last updated: 05/11/2024

Archived Messages

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

Thunderbird Thunderbird Last updated: 07/08/2023

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.

Firefox Firefox Last updated: 05/05/2024

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.

Firefox for Enterprise Firefox for Enterprise Last updated: 04/08/2021

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.

Firefox Firefox Last updated: 02/09/2024

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.

Firefox Firefox Last updated: 03/09/2021

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.

Firefox, Mozilla Account Firefox, Mozilla Account Last updated: 11/04/2023

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.

Firefox, Pocket Firefox, Pocket Last updated: 3 weeks, 3 days ago

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.

Firefox Firefox Last updated: 07/02/2022

Using Multiple Profiles

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

Thunderbird Thunderbird Last updated: 07/02/2021

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.

Mozilla VPN Mozilla VPN Last updated: 06/18/2023

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.

Firefox Firefox 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.

Firefox Firefox Last updated: 05/12/2024

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.

Firefox for Android Firefox for Android Last updated: 05/28/2024

Configuration Options for Accounts

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

Thunderbird Thunderbird Last updated: 11/13/2018

Config Editor

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

Thunderbird Thunderbird Last updated: 10/25/2023

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.

Firefox for iOS Firefox for iOS Last updated: 10/06/2023

Voice input in Firefox for Android

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

Firefox for Android Firefox for Android Last updated: 07/17/2020

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.

Firefox for Android Firefox for Android Last updated: 02/28/2023

Message List Columns

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

Thunderbird Thunderbird Last updated: 07/09/2017

Open Search

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

Thunderbird Thunderbird Last updated: 11/18/2018

Collections in Firefox

Learn how to use the Collections feature.

Firefox for Android Firefox for Android Last updated: 05/13/2021

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.

Firefox for Android Firefox for Android Last updated: 05/19/2021

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.

Firefox Firefox Last updated: 1 week, 2 days ago

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.

Thunderbird Thunderbird Last updated: 07/17/2018

How to Customize Toolbars

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

Thunderbird Thunderbird Last updated: 07/11/2023

Change your Mozilla account password

How to change your Mozilla account password if you detect strange activity on your account.

Firefox, Mozilla Account Firefox, Mozilla Account Last updated: 10/28/2023

Set a homepage in Firefox for iOS

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

Firefox for iOS Firefox for iOS Last updated: 2 weeks, 1 day ago

Customizing Firefox Using AutoConfig

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

Firefox for Enterprise Firefox for Enterprise Last updated: 01/12/2021

Access hidden tabs in Firefox

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

Firefox Firefox Last updated: 07/03/2018

Firefox Enterprise Kiosk mode

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

Firefox for Enterprise Firefox for Enterprise Last updated: 03/12/2020

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).

Firefox Firefox Last updated: 07/26/2023

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.

Thunderbird Thunderbird Last updated: 10/07/2021

Installing an Add-on in Thunderbird

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

Thunderbird Thunderbird Last updated: 12/17/2023

Access your add-ons with a Mozilla account

The (AMO) site is using Mozilla accounts to offer a more integrated experience across all Mozilla services and products.

Firefox, Mozilla Account Firefox, Mozilla Account Last updated: 11/28/2023

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.

Firefox Firefox Last updated: 12/19/2019

Managing 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.

Firefox for Enterprise Firefox for Enterprise Last updated: 05/30/2022

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.

Firefox Firefox Last updated: 07/01/2019

Dangerous directories

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

Thunderbird Thunderbird Last updated: 06/26/2020

Firefox Notes status

Learn more about the discontinuation of Firefox Notes on November 1, 2020.

Firefox Firefox 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.

Firefox Firefox 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.

Firefox Firefox Last updated: 04/11/2024

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 Thunderbird Last updated: 06/12/2024

Firefox Suggest for Mobile

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

Firefox for Android, Firefox for iOS Firefox for Android, Firefox for iOS Last updated: 04/22/2024

Creating a Newsgroup Account

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

Thunderbird Thunderbird Last updated: 07/23/2018

Configuration Options for Tags

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

Thunderbird Thunderbird Last updated: 02/01/2018

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.

Firefox for iOS Firefox for iOS Last updated: 04/04/2021

Through the Looking Glass

Learn more about Firefox's collaboration with Mr. Robot on a shared experience.

Firefox Firefox Last updated: 12/19/2017

Debugging policy issues

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

Firefox for Enterprise Firefox for Enterprise Last updated: 11/01/2023

Managing policies on macOS desktops

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

Firefox for Enterprise Firefox for Enterprise Created: 02/01/2019

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.

Firefox, Pocket Firefox, Pocket 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.

Firefox, Firefox for Enterprise Firefox, Firefox for Enterprise 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.

Firefox, Pocket, Privacy and Security Firefox, Pocket, Privacy and Security Last updated: 2 weeks, 5 days ago

Tab context menu

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

Firefox Firefox Last updated: 3 weeks, 6 days ago

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.

Firefox Firefox Last updated: 02/01/2021

View bookmarks on your home screen

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

Firefox for Android Firefox for Android Last updated: 4 weeks ago

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.

Firefox for iOS Firefox for iOS Created: 02/21/2022

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.

Firefox Firefox Last updated: 01/02/2023

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 for Enterprise Firefox for Enterprise Last updated: 10/27/2023

Address autofill on Firefox

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

Firefox for iOS Firefox for iOS Last updated: 05/29/2024
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