[Bug 711305]

[I-dan-j]

In Windows, delete the entry in Windows Environment:
In Windows Settings, search for environment | Choose "Edit system environment variables"
Select "Environment Variables" and under "System Variables," DELETE the environment variable MOZ_NO_REMOTE
It doesn't matter whether the variable value is set to 0 or to 1 —  the mere presence of the variable appears to cause this problem, including if you try to send an email from Thunderbird from any browser.

-- 
You received this bug notification because you are a member of Mozilla
Bugs, which is subscribed to Mozilla Thunderbird.
https://bugs.launchpad.net/bugs/711305

Title:
  Thunderbird is already running, but is not responding. To open a new
  window, you must first close the existing Thunderbird process, or
  restart your system. Error received when clicking a mailto link in
  firefox.

To manage notifications about this bug go to:
https://bugs.launchpad.net/thunderbird/+bug/711305/+subscriptions