I installed the Mozilla Firefox ESR snap using sudo snap install firefox --channel=esr/stable. When Firefox is not running, firefox 'https://askubuntu.com' successfully opens this website in Firefox. However, if there is an existing Firefox window, the same command would produce an error message: "Firefox is already running, but is not responding. To use Firefox, you must first close the existing Firefox process, restart your device, or use a different profile." How do I use the command line to open a webpage in an existing Firefox window?
Firefox version: 102.10esr. Ubuntu version: Ubuntu 20.04.6 LTS.
