I was able to acquire a signed version of the extension for distribution outside of addons.mozilla.com after changing the add-on ID. I moved the source code here: https://nosuchdomain.mooo.com/git/doc/librifyjs-libgen.me
You can find the signed binaries in the releases folder, e.g. for the currently latest release: https://nosuchdomain.mooo.com/git/doc/librifyjs-libgen.me/raw/branch/master/releases/librifyjs_libgenme-0.1.1-fx.xpi It should be possible to download the file from here and include it in the IceCat build. Let me know if there are any issues or if I can do anything else to help.
