I appreciated how the reddit app I used (relay) kept everything internal. I don’t want all the links I open on this app opening in my browser and plugging up my history. I doubly appreciated how it would open YouTube links in an internal video player that wasn’t linked to my YouTube account in any way. This is a must have for me to prevent my YouTube “algorithm” from getting any ideas. For example, I watch a video about “X” and now my whole feed is suggesting I watch more videos about whatever “X” was.
arguably it’s just a stopgap solution, but i really like quickib for viewing image links
it’s meant as an imgur uploader, but it works as a viewer (not open source though)