Hi, our AMO admins are currently analyzing it. I'll get back to you as soon as I have any updates.

For a theme, it couldn't be malicious and it doesn't store any data.

Hi,

Thank you for reaching out! Could you please go to the Firefox menu > Extensions and themes > Themes (?), find the blocked theme there, click the "See details" button and share a link that opens? That will let us identify the add-on and check what happened there. (You can see how it looks like here.)

We’ve been experiencing a large amount of malicious users and activity related to extensions submissions and took action yesterday to make sure users visiting addons.mozilla.org are not exposed to that.

Unfortunately, a few legitimate accounts were caught in this as well.

Developer of that theme should contact AMO admins to unblock it.

Hey Denys, TyDraniu,

Thank you for the information! The extension no longer shows as being blocked by Mozilla, and is available again on https://addons.mozilla.org/en-US/firefox/addon/graphite-grace/

This must have been, as TyDraniu said, due to the large amount of reported malicious activity that resulted in some legitimate accounts being affected. Good news to me!

Thanks again!

Glad to hear that! Sorry for the hassle.