Except while Basilisk's UI doesn't change often mainly because work specifically on the UI is not a high priorty by any means but it is not invulnerable either. It does change if the platform changes require it to and other platform changes that affect extensions are still happening.
So Basilisk is in the exact same situation as Pale Moon except that it still uses its Firefox GUID and advancement of its unique UI and featureset just aren't broadly important enough to bother with unless it needs fixed/changed for changes elsewhere.
Let me lay out what is coming next for Pale Moon et all:
We WILL remove
the six year old temporary
hack known as the "Dual-GUID System" that bypasses the install check and allows extensions with a Firefox targetApplication
introduce a new Add-on JSON-based Install Manifest to be the new format going forward for all applications. This will have a similar but not identical data structure to the current RDF-based Install Manifest in order to eliminate long standing issues and quirks of the format. This will be fully documented on DPMO
when it lands for testing on trunk/unstable.
disable the RDF-based Install Manifest processing globally on the platform except for Basilisk and Interlink.
will not happen at once but will be staggered out across the release cycles
only the exact timing is in question. But we will end the year with this long accomplished. So everyone best get out of their little (fire)foxhole and pay attention
To support this there will be a new fully from scratch new version of the Phoebus Add-ons Site Software written to address and eliminate many issues from its past development which will add whole new fearures and granular controls for developers and their Add-ons including new types and pseudo-types.
The new software will NOT
accept submission of new or updated add-ons using the RDF-based Install Manifest. But will continue to serve all it has at that time. I am also considering a one-time automatic conversion of latest versions of all Extensions and Themes to the new JSON-based Install Manifest. We shall see on that.
the plans for going forward and if we survive them we will ALL be in a better situation. It would be a great shame if after all this work and years of service that we should fail because of lack of vision by the userbase and current/incoming developers. A great shame, indeed.
So you see, Moon Fester Tool will be of little use going forward.