I'm trying to make Waterfox (a Firefox fork) a favorite in the dock, but the option isn't there. I can't do it by dragging the icon to a different position, either. It worked fine until Waterfox updated recently. What gives?
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@vanadium I disagree. For example, you could give general information about why this type of thing might happen. There can't be that many reasons why an application could be un-pinnable to the dock. – Jack M Oct 08 '22 at 14:29
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1@vanadium Are there any possible reasons besides what I wrote in my answer? – Jack M Oct 08 '22 at 23:31
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@vanadium Yes, and I notice you were able to answer that question without knowing any further details than I posted here, and that you gave the same answer as me (which you said was wrong), other than the extra completeness of including the answer for Wayland as well. – Jack M Oct 12 '22 at 10:37
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This can happen when the property StartupWMClass is not set in the corresponding .desktop file. Open the .desktop file you're trying to set as a favorite in a text editor, and add (in the [Desktop Entry] section) a line saying:
StartupWMClass=[see below]
To determine the correct value, launch the application (i.e. by double clicking the .desktop file). Now open a terminal and run xprop WM_CLASS. Click on the application. The terminal will print something like
WM_CLASS(STRING) = "Navigator", "waterfox"
Take the most "specific" seeming value and put it, without quotes, as the value of StartupWMClass in your .desktop, e.g. StartupWMClass=waterfox.
Jack M
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- This is not the reason why you cannot pin an application. 2. Your instructions may not work on a majority of standard Ubuntu 22.04 versions, where applications may be running on Wayland
– vanadium Oct 09 '22 at 10:13