06/04/2018 (Mon) 17:33:41
It's a better browsing experience. You don't need to bloat the program with "web features" that are never going to be used. Me browsing only this page uses 400MB of RAM due to the fact that I have to open Firefox. You also get dedicated controls (as mentioned above).
As for the actual viewing of images, most terminals have support for rendering images (ranger, for example, has thumbnail support for images), and if they don't it's not too hard to make a script to open sxiv or something to view them.