Update:
Firefox is starting it.
├─gnome-launched-firefox.desktop-16219.scope
│ ├─16219 /usr/lib/firefox/firefox -new-window
│ ├─16286 /usr/lib/firefox/firefox -contentproc -parentBuildID 20200829200810 -prefsLen 1 -prefMapSize 236679 -appdir /usr/lib/firefox/browser 16219 true socket
│ ├─16516 /usr/lib/firefox/firefox -contentproc -childID 2 -isForBrowser -prefsLen 1416 -prefMapSize 236679 -noScache -parentBuildID 20200829200810 -appdir /usr/lib/firefox/browser 16219 true tab
│ ├─16526 /usr/lib/firefox/firefox -contentproc -childID 3 -isForBrowser -prefsLen 1416 -prefMapSize 236679 -noScache -parentBuildID 20200829200810 -appdir /usr/lib/firefox/browser 16219 true tab
│ ├─16585 /usr/lib/firefox/firefox -contentproc -childID 4 -isForBrowser -prefsLen 1600 -prefMapSize 236679 -parentBuildID 20200829200810 -appdir /usr/lib/firefox/browser 16219 true tab
│ ├─16646 /usr/lib/firefox/firefox -contentproc -childID 5 -isForBrowser -prefsLen 7644 -prefMapSize 236679 -parentBuildID 20200829200810 -appdir /usr/lib/firefox/browser 16219 true tab
│ ├─16708 /usr/lib/firefox/firefox -contentproc -childID 6 -isForBrowser -prefsLen 7779 -prefMapSize 236679 -noScache -parentBuildID 20200829200810 -appdir /usr/lib/firefox/browser 16219 true tab
│ ├─16751 /usr/bin/python3 /usr/bin/chrome-gnome-shell /usr/lib/mozilla/native-messaging-hosts/org.gnome.chrome_gnome_shell.json [email protected]
│ ├─16850 /usr/lib/speech-dispatcher-modules/sd_dummy /etc/speech-dispatcher/modules/dummy.conf
│ ├─16853 /usr/lib/speech-dispatcher-modules/sd_espeak-ng /etc/speech-dispatcher/modules/espeak-ng.conf
│ ├─16859 /usr/lib/speech-dispatcher-modules/sd_generic /etc/speech-dispatcher/modules/mary-generic.conf
│ ├─16862 /usr/bin/speech-dispatcher --spawn --communication-method unix_socket --socket-path /run/user/1000/speech-dispatcher/speechd.sock