Mail 8.1 won't open links from messges

Question

When reading a message,  links within the message won't open. When I 2 finger click on the link, the drop-down window ask  "open, open link behind mail, copy link, services" . None of them work.
Before Yosemite. I could 2 finger click and choose whatever, my preference was "open behind mail". Always worked.....
Now 2 finger (right) click does nothing.... If I just click on the link, it opens my browser on top of mail.

Answer 1

I just want to link to these earlier threads so you don't get a lot of duplicate suggestions that have already been covered there:
* [https://support.mozilla.org/questions/1018542 Firefox won't open email links after update to version 32]
* [https://support.mozilla.org/questions/1023202 No tab opens when I click on a link if any Firefox window is already open]
(There might be others, but those are the ones I've seen)
Work is proceeding on [https://bugzilla.mozilla.org/show_bug.cgi?id=1017595 Bug #1017595 – Links from external applications sometimes fail to open when Firefox is hidden] but as you can tell from the title, this is focused on the problem of Firefox not coming out of hiding from the dock or coming out of hiding but not loading the page. If this also occurs when Firefox is not hidden at all, there may be a secondary issue. But hopefully solving the one will solve the other. Unfortunately, I don't know whether it will be in time for Firefox 33.