How to use Firefox snap with keepass snap?

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see this discussion:

Native messaging support in strictly-confined browser snaps

This topic was already discussed in various places (forum posts, bug reports), so this is an attempt to collate and synthesize information in order to facilitate discussion to unblock the situation. Native messaging is a mechanism implemented in several major browsers (Chromium, Firefox, Brave, Edge, others?) that allows web extensions to communicate with a native application installed on the system. This mechanism is used by different types of applications to provide better integration betwee…