Mozilla Firefox Spyware Mitigation Guide
-This guide was tested working with Firefox version 74.
+Note: This guide is deprecated. Sometime in the future it will be updated again.
+You may want to see this for more information.
After configuring Mozilla Firefox with ghacks-user.js, according to this guide it's rating changes like so:
Spyware Rating: High → Not Spyware
The ghacks user.js is a template which aims to provide as much privacy and enhanced security as possible, and to reduce tracking and fingerprinting as much as possible — while minimizing any loss of functionality and breakage (but it will happen).[2]