Links do not open in emails. Have to copy them and open in Firefox.

First, make sure FF is the default browser: FF menu > Settings > Home and startup. If it is, try this:

Go to TB menu > Settings > General

- scroll all the way down and click the 'Config editor' button on the right

- click 'Accept the risk and continue' if that appears

- search for network.protocol-handler.warn-external

- change network.protocol-handler.warn-external.http and network.protocol-handler.warn-external.https to true

Click a link in a message a couple of times. The first time, nothing may happen. The second time, either the browser should open or you should be given a choice of browsers to open.

Once it's working, set the two preferences back to false.

This does not work and as you can see I have had to copy the link to reply using Firefox.

What version of Thunderbird?

What version of Firefox?

What is your operating system?

See this article for some possible solutions:

https://support.mozilla.org/en-US/kb/hyperlinks-in-messages-not-working

The most likely is to reset your default web browser in your operating system (in Windows, see Settings | Default Apps.) If it appears to be already set correctly, change it to another browser temporarily, then change it back to your preferred.