Hello,

Expand the technical details on the untrusted page and see what the appropriate steps are by following the "This Connection is Untrusted" error message appears - What to do article.

thank you! I'll try the fix noted in the article.

You can try these steps in case of issues with web pages:

You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.

• Hold down the Shift key and left-click the Reload button
• Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
• Press "Command + Shift + R" (Mac)

Clear the cache and remove cookies only from websites that cause problems.

"Clear the Cache":

• Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

• Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

• Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
• Do NOT click the Reset button on the Safe Mode start window

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

I followed the steps as you suggested. unfortunately I still have this problem with firefox, att.yahoo mail.

Are you using a secure https:// link to open that page?

If you are using a bookmark then try to navigate to the page starting with the main home page of the website or the login page.

hello to both of you and thank you for the tips. I tried it all and still have this problem with firefox not trusting att.yahoo mail. Plus now all the cookies are gone and the add ons are gone. I can read att.yahoo mail with Chrome. I hate to leave Firefox.