Pale Moon not allowing links to be opened from email

[Kenny]

Everyone,

I'm having a problem opening links that I receive from email. This didn't happen before updating to version 12. Don't know if it's just a coincidence or not and haven't noticed anyone else mentioning of a similar situation.

My email client is Thunderbird and if I receive an email with a web link and I click on that link, an alert window from Pale Moon is displayed with the following message:

Pale Moon is already running, but is not responding. To open a new window, you must first close the existing Pale Moon process, or restart your system.

Yes, I can confirm the Pale Moon is indeed running and it's running just fine for me. So, I don't understand why this message states that it's not responding. Pale Moon is also my default browser.

Thanks in advance!

[Moonchild]

If the browser works fine otherwise, then you may likely be running it with the "-no-remote" switch (e.g. if you use it to run multiple profiles on one machine, etc.). This won't work for using the browser to open external links.

[Kenny]

Hi,

I guess the "-no-remote" switch option doesn't apply to this situation.

I open Pale Moon from the icon on the taskbar and this is what is in the Target field when I check the Properties: "C:\Program Files (x86)\Pale Moon\palemoon.exe"

[Moonchild]

It can also happen if you have the environment variable MOZ_NO_REMOTE=1 (Control Panel > System > Advanced > Environment variables).

Otherwise, in favor of repeating what the Mozilla KB has already clearly stated, I'd like to forward you to the causes/solutions there:
http://kb.mozillazine.org/Profile_in_use

Also, some answers may be found in Firefox Support, for example your very specific situation here:
http://support.mozilla.org/en-US/questions/710261