Status of Eclipse extensions

If I install Eclipse from the snap store what
happens to extensions such as PyDev etc.

  1. if they are downloaded/installed via Eclipse
    are they installed like a snap or within
    the eclipse snap directory?
  2. are they isolated by the eclipse snap sandbox?
  3. something else?

Eclipse is snapped as “classic”, so there is no real confinement. Plugins are installed into ~/snap/eclipse/current since (2020-03 has this merged).

So plugins are not shared between snapped Eclipse and traditional install, but will be kept installed when Eclipse snap is updated.