These are NoScript surrogates for some pastebins that require JavaScript but offer a raw version. The surrogates allow you to view pastes, but not create new pastes.
noscript.surrogate.dropbin.replacement = location.replace("/t" + location.pathname);
noscript.surrogate.dropbin.sources = !dropb.in
noscript.surrogate.dropbin.exceptions = ^https?://dropb\.in/(?:t/|$)