I had mentioned in New AOM & The Sandbox some of the pre-existing add-ons (such as Resizeable Textarea) had been in placed in the sandbox. This was causing users to get an “Add-on not found!” message when they tried to follow a link to an existing add-on that was in the sandbox. Based on user feedback this has changed:
All add-ons that were public in AMO prior to Remora’s launch this weekend should now be publicly available on AMO again.
News Source: Mozilla Webdev
Still looks broken to me…here is an extension in the sandbox:
If you click on that you will still receive the error. Once they do fix it I’ll be very happy, but right now I think we have a lot of “broken” links on our site. 🙁