Mobile apps, such as NBC News on Android, access resources that have responses which are encoded with Content-Type: application/x-zip-compressed.
Try it out using this URL from a browser.
http://data.nbcnews.com/drone/api/query/devices/nbcnews_android/5.10.5/prod_assets
It would be convenient to have Fiddler offer to decompress this content, just like what it does for gzip
Perhaps the easiest thing to do here would be to write a little extension that adds an "Explode ZIP" command to the Web Session list's context menu. Clicking that item would explode the ZIP to a temp folder, then use the CreateMockSession API to create one new "virtual" Session for each file in the ZIP file, then delete the Temp folder.
This would be ~30 lines of code or so. Let me know if you need help!
These are just regular PKZIP files? If so, you could easily write a custom rule that performs the decompression, but PKZIP files can have multiple individual assets within, so I'm not sure how Fiddler would be able to render such things in a useful manner (modulo building a custom inspector?)