It appears that all NSFW content is blurred. I looked in the user settings, and I don't appear to have any option to disable it. All that I see is the following:
Edit: I just found out that !lemmy_support@lemmy.ml exists. I assume that these sorts of posts are supposed to go there. I will crosspost this to that community.
Watch the reported issue.
As for now, you can install an extension like Stylus and create a style like this:
I'm using it with FireMonkey on Firefox, but I believe it should work with Stylus too.
For those using other Lemmy instances, you need to edit or duplicate the
@match
line with the URL of the one you're using.