Dark, Black, Gray
What is Dev28?
Dev28 is a Firefox add-on by user14. This add-on has 13 daily active users, a perfect 5.0 rating, and was removed from Firefox Browser Add-ons a year ago. The latest version, 89.15, was updated a year ago.
Dev28 is safe to use. It does not request any sensitive permissions.
Dev28 may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.