This article provides information on errors you can receive when loading web sites in Firefox. Choose the link that best describes your problem.

One of these specific error messages:

• Server not found
• Warning Unresponsive script
• Could not initialize the browser security component
• Firefox cannot connect securely because the site uses an older insecure version of the SSL protocol
• The page is not redirecting properly
• Firefox cannot connect securely because the SSL protocol is disabled
• "Error response Error code 500. Message: Internal Server Error" on secure sites
• Firefox has encountered a problem and needs to close
• Quality Feedback Agent dialog

A message that mentions:

• Cookies
• OCSP

No error messages, but:

• The web site just doesn't look right

Many other errors with web sites can be fixed by clearing the cookies stored by the site and clear your Firefox cache:

1. At the top of the Firefox windowOn the menu bar, click on the ToolsFirefoxEdit menu, and select Options...Preferences....
2. Select the Privacy panel.
3. Click Show Cookies... to open the Cookies window.
4. In the Search: field, type the first few letters of the name of the site with problems (e.g. yahoo).
5. Select the cookies that come up in the list and click Remove Cookie
6. Click Close to closeClose the Cookies window
7. Select the Advanced panel at the top of the OptionsPreferences window.
8. Click the Network tab.
9. In the Cache section, click Clear now.
10. Click OKClose the preferences window.

Based on information from Error loading websites (mozillaZine KB)