There are over a hundred comments critical of Mozilla on that post.
Here's a follow up post. Mozilla is already revising its new Firefox terms to clarify how it handles user data
Over a 50 comments. I don't see any evidence of systematic downvoting.
Where do you see systematic downvoting?
Also what is your definition of systematic? Is 4 downvotes systematic to you?
Did you uninstall through terminal or through the GUI? If through the GUI try using the command line.