Firefox mostly, but I get what you are asking for. Ultimately my brain, I know I should bookmark more great links, but I guess in the end I just hope I remember them.
Besides that, just have my own forked merge of exolymph's and m4tthumphrey's replies.
As in another discussion, it's just part of life.. https://news.ycombinator.com/item?id=16338723 . If it wasn't HN, it would be slashdot, or ars, or medium, or searching deep into the web for ghost hosts.