There were some for Photoshop if I remember correctly. In Panorama tools by Professor Helmut Dersch of the University of Applied Sciences Furtwange. They would rotate and transform the stitch spherical panorama around in Photoshop like the Spherical viewers do. So you could work on the severely distorted persoective view Area in a view the corrected to a normal perspective.
You may want to look at Panorama Tools for the Photoshop Plug-ins. I do not know if they will function in new versions of Photoshop or if they are 32Bit Plug-ins or 64Bit plug-in versions of the plug-ins. The Package is quite old....
For blurring faces , number plates etc I would do that on the 2D opened layer.
Yo view the sphere:
With the layer selected go to 3D - New Mesh from Layer - Mesh Preset - Spherical Panorama
When looking around use the camera orbit control so that you stay viewing from the centre of the sphere. If you move the camera or object you could come out of the sphere.
To widen the view go to Current view in the 3D panel , then in properties change FOV (field of view) value
One year later, don't know if you're still in the the need and if you updated your graphics card, but the Photoshop team added an easy workflow for 360 :
360 panorama workflow
Edit and export 360 panoramas. Photoshop will maintain important metadata to work with third-party viewers. You can also pan and zoom around your image inside a spherical workspace for a realistic preview experience.