I packaged uBlock Origin as suggested by Marius. Source package: http://mentors.debian.net/debian/pool/main/u/ublock/ublock_1.1.1+dfsg-1.dsc Mentors page: http://mentors.debian.net/package/ublock
I also enabled the chromium build for this one. debian/uBlock0.pem is a private key which the .crx file is signed with and is required in order to keep the same extension ID across rebuilds and upgrades. More info about this here: http://crbug.com/420373
