I’ve been trying to figure out on mobile how to turn off the now-default “Safe-settings to On” that tumblr just switched on for everyone, and it’s not in the app itself. Here’s how you change it:
From mobile iOS: Go to Settings >> Tumblr >> Tumblr Settings > Safe Mode > Don’t hide anything
It’s not in the app itself it seems (at least on mobile). You have to go into actual phone settings. Hope this helps others, it sure annoyed me. Mobile sucks lol.