Performance and connectivity Deal with error messages, crashing applications, connectivity issues, and slow performance. In English Captive portal detection How to troubleshoot time related errors on secure websites Connection settings in Firefox How to troubleshoot security error codes on secure websites What do the security warning codes mean? Manage the devices linked to your Mozilla account Multi-Hop - Encrypt your data twice for enhanced security while using Mozilla VPN Mozilla VPN won’t connect or keeps disconnecting - How to fix Firefox blocked by macOS 15 Sequoia firewall - What you need to know Firefox can't load websites but other browsers can Disable Firefox Sync Report Site Issues on Firefox for iOS Using a Primary Password with Sync How to let Firefox use the internet on your Windows computer Certificate warnings in Firefox for iOS Browsing history in Firefox - View the websites you have visited What is the Mozilla VPN kill switch? Fritz!box isn't working when Mozilla VPN is on RCS messaging and Mozilla VPN Server Not Found - Troubleshoot connection problems How to resolve weak crypto error messages on Firefox How to obtain the Mozilla VPN Logs Connecting to unsecured networks while using Mozilla VPN Firefox for iOS won't load web pages Joining public WiFi while on Mozilla VPN Exclude applications from Mozilla VPN protection Troubleshooting speed issues on Mozilla VPN Search your browsing history in Firefox for iOS Why do I see a white screen after updating Mozilla VPN to version 2.8.3? Resist Fingerprinting Address screen sharing issues with Firefox on macOS 15 Sequoia