The link to App Screenshot Frames at source/_guides/appstore-publishing/appstore-assets.md is currently broken, returning an XML responsewhich states
The bucket you are attempting to access must be addressed using the specified endpoint. Please send all future requests to this endpoint.
A copy of pebble-frames.zip is obtainable via the Wayback Machine here.
The link to App Screenshot Frames at source/_guides/appstore-publishing/appstore-assets.md is currently broken, returning an XML responsewhich states
A copy of pebble-frames.zip is obtainable via the Wayback Machine here.