Never install an extension from a piracy website.
Before discussing the "install" process, it is critical to understand what the base domain represents. 9xmovies (and its various mirrors like 9xmoviesguru, 9xmoviespress, etc.) is a notorious piracy website. It hosts thousands of pirated movies, web series, and TV shows across multiple languages, including Hindi, Tamil, Telugu, Malayalam, and English. 9xmoviesgurucom install