Are you trying to open these links from inside Firefox, or something else.

Is Firefox your default browser?

Type about:preferences#general<enter> in the address bar. Turn on Make Firefox Default Browser. You can also turn on; Always Check Firefox Default Browser.

Yes Firefox is my default browser. I am trying to open them from email links in Thunderbird which I use for my email.

Thunderbird should be using the default browser. Try starting Thunderbird in Safe Mode; https://support.mozilla.org/en-US/kb/safe-mode-thunderbird

Is the problem still there?

Do the links open properly if you paste them in the Firefox location/address bar?

The links are hidden so you just have to click on them. I can open Classmates in Firefox but the email information does not show up there. I tried the safe mode and that does not help either.

Right-click on some of the links and select Copy Link. Then post them here or send a Private Message to one of us.

I sent you a private email first about this. But when I went back and tried a right click, copy, then pasted it in Firefox, it did work. So now I am completely confused as what is going on!!

I will check the e-mail when I get it.

I looked at the e-mail. The web address being used is a redirect link thru a 3rd party website. I don't know if that is the issue.

Cor-el, did you want to take a look?

It could be helpful to check the email links.

Note that a possible cause for opening in a link in a search engine page could be that this isn't a fully qualified link with a protocol (http: or https:), but is still formatted to open the default browser. Very long links may also fail.

I sent you a PM.

Fred I did not get the PM.

Sorry, I meant an e-mail.

Was one of the above the email?

Was able to do a right click and copy to get the link to open. I take it the long addr3ss is the problem and going through another web site is causing the problems. They worked in past so not sure what has changed all this.

To diagnose problems with Thunderbird, try one of the following:

• Restart Thunderbird with add-ons disabled (Thunderbird Safe Mode). On the Help menu, click on "Restart with Add-ons Disabled". If Thunderbird works like normal, there is an Add-on or Theme interfering with normal operations. You will need to re-enable add-ons one at a time until you locate the offender.
• Restart the operating system in safe mode with Networking. This loads only the very basics needed to start your computer while enabling an Internet connection. Click on your operating system for instructions on how to start in safe mode: Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, OSX

If safe mode for the operating system fixes the issue, there's other software in your computer that's causing problems. Possibilities include but not limited to: AV scanning, virus/malware, background downloads such as program updates.