Error messages: what they mean and how to fix
How to troubleshoot error messages on Firefox
- Какво означава "Вашата връзка не е сигурна"? When connecting to a website that uses an invalid TLS certificate or weak encryption, Firefox will display an error page saying "Your connection is not secure".
На английски език
- How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites
- Troubleshoot the "Secure Connection Failed" error message
- How to troubleshoot time related errors on secure websites
- Warning Unresponsive script - What it means and how to fix it
- What do the SSLv3 error messages mean on Firefox?
- "Firefox is already running but is not responding" error message - How to fix it
- Fix "The bookmarks and history system will not be functional" error message
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- How to fix the Update Failed error message when updating Firefox
- How to run Firefox when your profile is missing or inaccessible