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SSL is required for a secure connection to a web site such as a bank. There are several things to check if you are a Firefox, Mozilla Suite, or Thunderbird user and you get the error “You cannot connect to website because SSL is disabled” when trying to connect to a web site.

Check your SSL settings in “Tools -> Options -> Advanced -> Security” (Firefox) or “Edit -> Preferences -> Privacy & Security -> SSL” (Mozilla Suite). “Use SSL 2.0″, “Use SSL 3.0″, and “Use TLS 1.0″ should all be checked.

Select “Tools -> Options -> Advanced -> Verification -> Do not use OCSP for certificate validation” (Firefox) or “Edit -> Preferences -> Privacy & Security -> Validation -> Do not use OCSP for certificate validation” (Mozilla Suite).

If you’re using a manual proxy, make sure “Use this proxy for all protocols” and “SSL proxy” in “Tools -> Options -> General -> Connection Settings” (Firefox) are set to the correct values.

If you received the message “Could not initialize the browser’s security component.” The most likely cause is problems with files in your browser’s profile directory. Please check that this directory has no read/write restrictions and your hard disk is not full or close to full. It is recommended that you exit the browser and fix the problem. If you continue to use this browser session, you might see incorrect browser behavior when accessing security features….

  • Check your hard drive’s remaining capacity and the file permissions on the files in your profile folder.
  • Delete the cert8.db file in your profile folder and try again.

Software installation is currently disabled error, Click Edit Options… to enable it and try again. You click Edit Options and there is no option to enable software installation. Here’s how to fix it.

Since the option to enable software installation no longer exists in the UI, you will need to use about:config to reset the xpinstall.enabled preference to the default true value.

1. Type about:config in the Location Bar and hit enter.
2. Type xpi in the Filter box and find xpinstall.enabled in the list.
3. Make sure its value is set to “true” (double-click will toggle).