I haven't seen it anywhere on tumblr, so just so you know there's been a huge data leak reported with over 26 billion records compromised in many, many websites. Aside from the usual suspects of shady websites with tons of ads, the leak includes twitter, linkedin, adobe, canva, dropbox and tumblr.
please change passwords associated with those sites if you use them, and jic also change your gmail password as it's used to sign on/authenticate people in several websites. here are some tips on creating safe passwords:
make them long! 8 to 12 characters at least
use a combination of numbers, letters and symbols to create a phrase you can remember. for example, if I used my username as a password (which don't. don't do this) you could turn it into: V4mp1r3.$uns
Avoid multiple character repetition if you can. ie. don't add the same number, symbol, lowercase or uppercase letter more than twice
write them down in a notebook or paper only you have access to, or use a password manager
and remember! firefox comes in with more built in protections that any other web browser, install them in your phones if you haven't, and it comes with built in password managers that are accessible in all your logins if you log into your web browsing session. stay safe online!!