Firefox Send was effectively shut down months ago due to it being used to spread malware, but you could find messages saying that they're working on bringing it back.
I interpret this news as "it's not coming back".
I interpret this news as "it's not coming back".
No need for interpretation, they state it flat out:
"In the intervening period [since the temporary shutdown], as we weighed the cost of our overall portfolio and strategic focus, we've made the decision not to relaunch the service."