Learn how to protect your privacy and secure your data.
Common Myths about Private BrowsingLearn more about common misconceptions about Private Browsing in Firefox.
Avoid and report Mozilla tech support scamsMozilla does not provide telephone support and does not charge for software downloads, upgrades or technical help. Learn more.
Third-party trackersLearn about cross-site (third-party) cookies that collect information to track your browsing, which are used on many websites.
Enhanced Tracking Protection in Firefox for desktopEnhanced Tracking Protection in Firefox automatically protects your privacy while you browse.
Does Firefox share my location with websites?Learn what information Firefox sends to websites about your location and how to use and manage location-aware features of your browser.
Configure DNS over HTTPS protection levels in FirefoxDNS over HTTPS (DoH) is a recommended feature that enhances privacy. Learn more about the DoH protection levels you can configure in Firefox settings.
Add Firefox Relay to the Firefox password managerIntegrate Firefox Relay into the password manager to conveniently generate or reuse email masks from within email fields. Learn how.
HTTPS-Only Mode in FirefoxLearn more about HTTPS-Only Mode which forces all connections to websites to use HTTPS.
Manage technical and interaction data collection settings in FirefoxLearn what technical and interaction data Firefox collects, how it’s used, and how to manage or opt out on desktop, Android and iOS.
Private Browsing - Use Firefox without saving historyFirefox Private Browsing is great for viewing websites without saving things such as cookies, temp files and a history of the pages you visit.
Protect privacy while using Web AuthenticationLearn about Web Authentication, a powerful anti-phishing technology.
Sponsored shortcuts on the New Tab pageWorking with its advertising partners, Mozilla may place sponsored shortcuts on the default Firefox home page and New Tab page. Learn more.
Insecure connection password warning in FirefoxFirefox will show you a "connection is not secure" warning message when a website login page is insecure and information could be stolen.
How do I set up Sync on my computer?Use a Mozilla account to sync your bookmarks, history, passwords, add-ons and open tabs with another device, profile or version of Firefox.
Firefox Password Manager - Alerts for breached websitesFirefox's password management will show you alerts about logins potentially exposed in data breaches and passwords that may be vulnerable.
Automatically fill in credit card and payment method data on Web formsManage credit card autofill settings in Firefox version 81 and above.
Use a Primary Password to protect stored logins and passwordsSetting a Primary (formerly "Master") password in Firefox is helpful if your share your computer with others. We'll explain how it works.
Introducing Total Cookie Protection in Standard ModeFirefox users now have access to Total Cookie Protection by default. Find all you need to know about it in this article.
Pop-up blocker settings, exceptions and troubleshootingLearn what pop-up windows are and what settings Firefox has for blocking or allowing them.
Delete browsing, search and download history on FirefoxLearn what information is stored in your Firefox history and how to clear all or part of it if you are using a public or shared computer.
Firefox security features warning on LinuxCreate an AppArmor profile for Firefox on Linux.
How to manage your camera and microphone permissions with FirefoxHow to enable or block sites from accessing your camera and microphone on your desktop or mobile device.
Global Privacy ControlHow to make Firefox advise websites that you visit not to sell or share your browsing information.
How do I turn on the Do Not Track feature?This article describes the “Do Not Track” feature in Firefox 134 and below, that lets you tell websites not to track your browsing behavior.
How does built-in Phishing and Malware Protection work?Firefox contains built-in Phishing and Malware Protection to help keep you safe online. This article explains how they work.
Manage daily usage ping data collection settings in FirefoxLearn how to manage daily usage ping data collection settings in Firefox.
Secure website certificateWebsites can present Firefox with a certificate to identify themselves. Find out how Firefox checks the authenticity of the sites you visit.
Trackers and scripts Firefox blocks in Enhanced Tracking ProtectionLearn how Firefox blocks common trackers and harmful scripts, to reduce the ability of third parties to collect data about your browsing.
Troubleshoot Firefox issues caused by malwareMalware is software designed to invade a computer without your knowledge. We'll explain common symptoms, how to prevent it being installed and how to remove it.
Privacy-Preserving AttributionFirefox 128 introduces privacy-preserving attribution, allowing advertisers to measure campaign performance while protecting user privacy.
Why are some add-ons not allowed on sites restricted by Mozilla?Learn why some Firefox add-ons might not work on certain websites and how to manage those extensions to enhance your browsing experience.
Firefox connection upgrades - HTTP to HTTPSFirefox upgrades connections from HTTP to HTTPS to enhance security and protect your data. Learn about server- and browser-initiated upgrades and how they work.
SmartBlock for Enhanced Tracking ProtectionSmartBlock lets pages load more fully, with less breakage – all while keeping those tracking scripts blocked.
Crash reports in Firefox for DesktopLearn about backlogged crash reports, how Firefox handles them and how to manage the setting to allow or prevent automatically sending crash reports
Automatically trust third-party root certificatesRoot certificates are the backbone of the security system that underpins HTTPS web traffic. Firefox, like most web browsers, includes a pre-installed set of trusted root certificates.
Mixed content blocking in FirefoxFirefox automatically blocks insecure or mixed content from secure web pages. We'll explain what that means and what options you have.
Site Information panelThe Site Information panel in Firefox tells you about a website's connection security and identity. Learn more.
Resist FingerprintingFirefox's Advanced Preferences to resist fingerprinting can help prevent websites from uniquely identifying your device but can cause problems. Learn more.
How do I tell if my connection to a website is secure?Firefox uses a padlock icon next to a website's URL to let you know your connection is encrypted. Click on the icon for more information.
Search suggestions in FirefoxLearn more about how search suggestions work in Firefox.
How to use Firefox containersThis article explains how to use Firefox containers with the Multi-Account Containers extension, to organize your online activities.
How to stop Firefox from making automatic connectionsLearn about the various reasons why Firefox makes automatic connections to the Internet and how you can stop it from doing so if you wish.
I found a fake Firefox updateWhat to do if you spot fake notices claiming to contain an "urgent" or "critical" Firefox update.
DNS over HTTPS (DoH) FAQsWe have outlined a list of FAQs here that you may find helpful while getting up to speed with all that DNS over HTTPS (DoH) has to offer.
Autofill logins on FirefoxFirefox lets you control whether or not to autofill your logins and passwords.
Certificate contains the same serial number as another certificateWhy Firefox may show you a Secure Connection Failed error when you try to access the configuration page for your router and what to do.
Site Permissions panelIf you allow or block permissions for a website, the address bar will show a Permissions icon that opens the Permissions panel. Learn more.
How do I choose what information to sync on Firefox?Learn how to select what information (bookmarks, add-ons, browsing history and other data) to share across your devices with Firefox Sync.
Suspicious activity on my Mozilla accountHow to protect yourself if suspicious activity is detected on your Mozilla account.
Manage your logins with the Firefox Password ManagerManage your saved logins and passwords on desktop Firefox with the built-in password management feature.
Firefox privacy and security featuresCheck Firefox's most advanced features and settings for safe, private online browsing.
Share browser windows or your screen with sites you trustLearn how to use Firefox's screen sharing feature safely.
How Firefox securely saves passwordsLearn how Firefox securely saves your passwords.
Firefox DNS over HTTPSDoH improves privacy by hiding domain name lookups from anyone lurking on public Wi-Fi, your ISP or others on your local network. Learn more.
Browsing history in Firefox - View the websites you have visitedFirefox keeps track of the websites you visit when you browse the Web. Learn how to view, search and sort your browsing history.
Encrypted Client Hello (ECH) - Frequently asked questionsEncrypted Client Hello (ECH) is a security feature in major Web browsers, available in Firefox 118 and enabled by default in Firefox 119. Learn more.
Remove a synced device from your Mozilla accountDisconnect a device from your Mozilla account and stop syncing its data.
How do I know the status of my sync?The Mozilla account toolbar icon tells you when you are signed in and syncing Firefox data. You can personalize it with your own avatar.
Change your two-step authentication device for your Mozilla accountWhat to do if you have two-factor authentication (2FA) setup on your account and need to migrate to a new device or phone.
Recommended Firefox privacy and security settings for familiesFirefox lets you customize privacy and security settings so you and your family can browse safely online. Learn more.
Sign in to a Mozilla account using 3rd-party authenticationYou can use your existing Google or Apple ID to sign up for a Mozilla account. Learn more.
Oblivious HTTP (OHTTP) explainedOne of the technologies used in Firefox to enhance online privacy is Oblivious HTTP (OHTTP). Learn what it is, how it works and how it helps protect your data.
Block and unblock websites with parental controls on FirefoxThis article explains how to block websites or filter website content in Firefox that may be offensive or inappropriate for children.
Disable Firefox Sync on a lost phone or tabletThis article describes what you should do to prevent someone from accessing your passwords on a lost device with Firefox Sync.
How to stay safe on the webThere are many scams, viruses and other dangers out in the Web. Take these simple steps to protect your computer and personal information.
How Firefox Sync keeps your data safe even if TLS failsFirefox Sync encrypts your data before it ever leaves your device, and ensures that the password to unlock this encryption is never transmitted to the server.
Telemetry collection - Windows default browser trendsThis article explains one example of how Firefox collects and uses telemetry data with the Default Browser Agent Windows scheduled task.
Total Cookie Protection and website breakage FAQLearn about Enhanced Tracking Protection and Total Cookie Protection in Firefox, and how to troubleshoot and report possible site breakage.
How do I share Firefox between people on a computer?Firefox can be used by several people on a single computer. Learn the basic protections to prevent others form accessing your private data.
Change your Mozilla account passwordHow to change your Mozilla account password if you detect strange activity on your account.
How do you use Google Firebase in Firefox?How Firefox Lite and Firefox ScreenshotGo use Google Firebase.
Primary Password is replacing Master PasswordPrimary Password is replacing Master Password. Learn more about why we are making this change.
Disable password saving in FirefoxIf you’re using a shared device and don’t want Firefox to remember your passwords, you can change your preferences in Firefox settings.
Disable Firefox SyncLearn how to turn off Firefox Sync if you’d like to use your Mozilla account without syncing data such as, bookmarks, history and tabs.
My privacy settings were changed from Custom to StandardIf your Custom settings match the settings in Standard, you will be switched back to Standard. This will not affect your settings.
Block deceptive content and dangerous downloads in FirefoxMake sure these settings are enabled to prevent unwanted downloads and block suspicious content on your children's sessions.
Manage marketing data settings in Firefox for DesktopLearn how Firefox Desktop collects marketing data, how Mozilla uses it, and how you can manage or opt out of marketing data sharing.
HTTPS-First upgrades to secure connectionsFrom version 136, Firefox implements HTTPS-First and always attempts to connect securely. If a secure connection fails it falls back to an insecure connection.
Share data with Mozilla to help improve FirefoxThe Telemetry feature sends us performance and usage data to help measure how Firefox behaves in the real world and improve it. Learn more.
About Firefox Desktop AttributionWhen you download and install Firefox, a "download token" is used, so Mozilla can identify how you reached the download page. Learn more.
Firefox service providers and partnersMozilla uses third-party service providers and trusted partners to help provide the Firefox desktop browser and related services. Learn what data is shared and more.
"Certificate cannot be trusted" warning in KazakhstanFirefox is blocking the use of Kazakhstan root CA certificate to protect your privacy. Learn more about how to stay safe.
Telemetry collection and deletionFirefox collects telemetry data by default and sends this data to Mozilla, to help improve Firefox performance and stability. Learn more.
Compatibility with Exploit protection on WindowsFirefox Compatibility with Windows Exploit protection.
Disable credit card and payment method syncing across devicesDisable credit cards and payment method syncing to prevent unwanted purchases on your shared devices.
Understand Encrypted Client Hello (ECH)Firefox version 118 introduced a security enhancement called Encrypted Client Hello (ECH), enabled by default in Firefox 119. Learn more.
Data Loss PreventionSeeing the DLP icon in Firefox? Here’s what it means and how it helps protect your data.
How Review Checker preserves user privacyLearn how Review Checker uses OHTTP to securely send product info to Fakespot, ensuring no personal data or browsing details are shared.
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