I use several instances of Firefox, that I usually launch from various launchers.
For example, I have a firefox-test.desktop file in ~/.local/share/applications, that contains:
[Desktop Entry]
Version=1.0
Name=Firefox-Test
StartupWMClass=firetest
Exec=firefox --new-instance --no-remote -P Test --class firetest %u
Icon=firefox-developer-icon
Terminal=false
Type=Application
MimeType=text/html;text/xml;application/xhtml+xml;application/vnd.mozilla.xul+xml;text/mml;x-scheme-handler/http;x-scheme-handler/https;
StartupNotify=true
Categories=Network;WebBrowser;
Keywords=web;browser;internet;pentest;
Actions=new-window;new-private-window;
It worked for ages, in many DE, including GNOME in 18.04.
But, in 19.04, clicking on my launchers does nothing.
On the other hand, the commands works from the terminal:
firefox --new-instance --no-remote -P Test --class firetest
Is this a bug? Or an expected change?