• Skip to main content
  • Switch language
  • Skip to search

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Mozilla Support Logo
Avatar for Username
  • Explore Help Articles

    Explore by product

    • Firefox desktop
    • Mozilla VPN
    • Firefox for iOS
    • Thunderbird
    • Firefox for Android
    • View all products

    Explore by topic

    • Settings
    • Installation and updates
    • Email and messaging
    • Performance and connectivity
    • Privacy and security
    • Browse
  • Community Forums

    Browse by product

    • Firefox desktop
    • Firefox Focus
    • Firefox for iOS
    • Thunderbird
    • Firefox for Android
    • View all forums

    Browse all forum threads by topic

    • Settings
    • Installation and updates
    • Email and messaging
    • Performance and connectivity
    • Privacy and security
    • Browse
  • Ask a Question

    Get help with

    • Firefox desktop
    • Firefox for Enterprise
    • Thunderbird
    • Mozilla Account
    • Firefox for Android
    • Firefox for iOS
    • Thunderbird for Android
    • Mozilla VPN
    • Firefox Focus
    • Firefox Relay
    • Monitor
    • View all
  • Contribute
  • Download Firefox
  • Sign In/Up

Search Support

  1. Home
  2. Knowledge Base Dashboard

All Products logo All Products

  • All Products
  • Firefox
  • Firefox for Android
  • Firefox for iOS
  • Mozilla VPN
  • Firefox Relay
  • Mozilla Monitor
  • MDN Plus
  • Firefox Focus
  • Firefox Enterprise
  • Thunderbird
  • Thunderbird for Android

Knowledge Base Dashboard

  • Last 7 days
  • Last 30 days
  • Last 90 days
  • Last Year
Article Visits Status Needs Update Ready for L10N Stale Expiry Date
Server Not Found - Troubleshoot connection problems 310,060
Review Needed: Updated outdated troubleshooting steps, added modern guidance for Troubleshoot Mode, VPNs and DNS-over-HTTPS, improved proxy and site-data instructions, and removed obsolete about:config DNS and IPv6 advice. Yes Show translations
Captive portal detection 271,099
Live Yes Show translations
Secure connection and security warning error pages in Firefox 266,370
Live Yes Show translations
Use built-in VPN in Firefox 246,760
Live No Show translations
Thunderbird and Junk / Spam Messages 178,443
Live No Show translations
Insecure connection password warning in Firefox 162,473
Live Yes Show translations
Set Firefox as your default browser on Android 157,145
Live Yes Show translations
About private browsing in Firefox for iOS 151,022
Live Yes Show translations
Firefox settings, preferences and other options 139,123
Live Yes Show translations
Update Firefox to the latest release 128,905
Live Yes Show translations
Complete overview...
Mozilla
Mozilla
  • Report Trademark Abuse
  • Source code
  • Twitter
  • Join our Community
  • Explore Help Articles
Firefox
  • Download
  • Firefox desktop
  • Android Browser
  • iOS Browser
  • Focus Browser
Firefox for Developers
  • Developer Edition
  • Beta
  • Beta for Android
  • Nightly
  • Nightly for Android
Mozilla Account
  • Sign In/Up
  • What Is It?
  • Reset Password
  • Sync Your Data
  • Get Help
Language
  • Twitter(@firefox)
  • YouTube (firefoxchannel)
  • Instagram (firefox)

Visit Mozilla Corporation's not-for-profit parent, the Mozilla Foundation.

Portions of this content are ©1998–2026 by individual mozilla.org contributors. Content available under a Creative Commons license.

  • mozilla.org
  • Terms of Service
  • Privacy
  • Cookies
  • Contact