You Are Not Hallucinating
Tumblr has put out an April Fools update that includes flashing imagery of what they’re naming “Tumblecoin.” There is currently no way to disable it.
If you suffer from hallucinations or seizures, I would highly recommend not using Tumblr on your web browser today (April 1st), due to the intrusive and flashing images they have added.
i knew tumblr was doing something for april fools but i had no idea until this post because mobile looks exactly the same as usual