email links in Thunderbird no longer work
I have a similar. but not identical issue email link issue; since last two Firefox updates, clicking on email links evoke the error message: "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window." and prompts me to close Firefox or quit. How do I fix this?
Additional System Details
- Shockwave Flash 32.0 r0
- User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0
The Firefox that is already open, how was it opened? Was a shortcut used?