Firefox Nightly desktop file

firefox-nightly.desktop

[Desktop Entry]
Version=1.0
Name=Firefox Nightly
GenericName=Web Browser
Comment=Browse the Web
Exec=/home/vlad/Applications/firefox-nightly/firefox --name firefox-nightly -P Nightly %u
Icon=/home/vlad/Applications/firefox-nightly/browser/chrome/icons/default/default128.png
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
StartupWMClass=Nightly
Categories=Network;WebBrowser;
Keywords=web;browser;internet;
Actions=new-window;new-private-window;profile-manager;

[Desktop Action new-window]
Name=New Window
Exec=/home/vlad/Applications/firefox-nightly/firefox --name firefox-nightly --new-window -P Nightly %u

[Desktop Action new-private-window]
Name=New Private Window
Exec=/home/vlad/Applications/firefox-nightly/firefox --name firefox-nightly --private-window -P Nightly %u

[Desktop Action profile-manager]
Name=Profile Manager
Exec=/home/vlad/Applications/firefox-nightly/firefox --name firefox-nightly -P %u

Hi,
I'm on X11 and I had to add --class firefox-nightly to the Exec:

Exec=/home/vlad/Applications/firefox-nightly/firefox --name firefox-nightly --class firefox-nightly -P Nightly %u

Otherwise, when lauching the nighly app, it was grouped with the standard firefox in the dock.

PS: Before that, I was using Wayland on Fedora (with Gnome), and the StartupWMClass did the trick. But on X11, I had to add the --class param