I do not have that version installed. But AFAIK K-Ninja 2.14 it is based on K-Meleon 1.02 en-US - so You should be able to use the plugins that work with that version.
BTW. many ppl here do not speak English well - greetings from Germany
Re: Privacy plugin (privacy.dll) no work with K-Ninja v2.1.4.x (portable or setup)