Ubuntu – Firefox profiles with different icons in Ubuntu dock

dockfirefoxgnome-shellubuntu-dock

Ubuntu 17.10 (xorg), GNOME 3.26.2, Firefox 58.0 (64 bit).

I have a few Firefox profiles setup. When I run each profile, I would like it to be a separate icon on the dock. How do I make that happen? Right now what happens is that they are all grouped in the standard Firefox icon.

Best Answer

Edit profile's .desktop file:

add --class SomeClass to the end of Exec key to change program's WM_CLASS value (see this article)
add new key StartupWMClass=SomeClass to the end of file (see this article and desktop entry specification)

The string SomeClass must be the same in both changes.

Example .desktop file:

[Desktop Entry]
Name=Firefox Test
Exec=firefox -p test -no-remote --class FxTest
Terminal=false
Type=Application
StartupNotify=true
Icon=/path/to/custom/icon.png
StartupWMClass=FxTest

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