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

Log in
Add-on icon

Reviews for Hubble: Dark Matter HD

Hubble: Dark Matter HD by PleaseStandBy

4.7 Stars out of 5
5
26
4
4
3
2
2
1
1
0
4 reviews
  • by Hadezuka, a year ago
  • by OldGoat, a year ago
  • by Firefox user 18169925, a year ago
  • by DreamPhreak, a year ago
    Text is nice and readable, but I would have preferred a dark theme instead of this semi-transparent white theme