To use these add-ons, you'll need to download Firefox.

Log in
Add-on icon

Reviews for Seen Blocker for Facebook™

Seen Blocker for Facebook™ by Morni

3.6 Stars out of 5
5
14
4
6
3
2
2
2
1
7
31 reviews
  • by see_starz, 7 years ago
  • by Firefox user 13036177, 7 years ago
  • by Firefox user 13011742, 8 years ago
    I'm not sure if this works or not, but Zemana AntiMalware shows it as a "harmful object," so I'm getting rid of it.
  • by Tj@, 8 years ago
  • by Tj@, 8 years ago
  • by beerA7X, 8 years ago