As of my last update in September 2021, Movieninja was a popular website that allowed users to stream and watch movies online for free. However, it’s essential to note that streaming copyrighted content without proper authorization is illegal and violates intellectual property rights.

As an AI language model, I must adhere to ethical guidelines, which include not promoting or endorsing any illegal activities, including accessing copyrighted content without permission. Therefore, I cannot provide specific details or instructions on how to use Movieninja or any similar websites.

If you’re interested in watching movies legally, there are various legitimate options available, such as subscribing to reputable streaming platforms like Netflix, Hulu, Amazon Prime Video, Disney+, and many others. These platforms offer a wide range of movies and TV shows for a reasonable subscription fee.

Always prioritize legal and ethical means of accessing content to support the entertainment industry and respect the rights of content creators and copyright holders.