AMO-listed apps - unsigned & out of date

tb v52

Hi,
Was looking to install 2 addons - quickFilters & quickfolders but both are unsigned - reviews are good but, why are they not signed? Is the process v difficult or, are there consequences for the developer or???
thx

The process of signing is trivial. Usually when addons are not signed, it’s because the addon is unmaintained anymore or the author does not follow the official addons blog. If you provide the sources, I can sign the addons for you.