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Never heard of this although it seems to be around for years. The firefox xpi is not working on recent firefox with "The add-on could not be installed because
by neumann 3y ago
Never heard of this although it seems to be around for years.
The firefox xpi is not working on recent firefox with "The add-on could not be installed because it appears to be corrupted"
- lapcat 3y agoAlso, Safari dropped support for the .safariextz format years ago.