Good and extremely worthwhile if you adopt Startpage as your search engine of choice like I have.
The (although limited) tracker blocking is nice, and the page score lets you know what site tries to screw with you, still like it to pair it with Ublock, as that will block what trackers slip away from this.
The standard eye grating light theme search page that it tries to force upon you is the only detracting point of this extension, so I had to install the 3rd party Startpage Search — Dark Theme extension to get the best optimal experience.

This extension is really good, but one feature request. Can you set it so that the search bar uses post instead of get? I typically use the firefox search bar to search for things, so even if the engine tries to use post within itself, the browser's search bar still uses get searches instead of post.