Firefox Snap: Local extension/addon registration

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@Dominik

My question: What’s a correct place to install local XPI files where Firefox Snap can access them? How can I find out to which directories Firefox Snap has local access to?

For system wide files you can use firefox’s $SNAP_COMMON directory (which translates to /var/snap/firefox/common/) if you have things particulary bound to the firefoix version you could use $SNAP_DATA which translates to /var/snap/firefox/current though note that the latter dir gets copied forward with each new snap revision (and switches back along the snap if you do a snap revert)