I suspect the answer is “no”, but… Is it possible in install.rdf to have element overrides (or whatever) that are conditional on application version? (Sort of like how em:targetApplication can be used for different upper and lower versions support depending on application.)
Reason: The changes between Thunderbird 52 and 60 have made it so I need different values for optionsType and optionsURL depending on version. (I’m going to abandon <v60 if this isn’t possible…)
Thanks in advance.