I’ve built the SAFE Browser branch and the error remains.
With
FilesContainer created at: "safe://hnyynywy171fpi6xxptsbkz7cda5y7w3k7jtpp71h7oacy8ydbkwfgbgkhbnc"
+ file.css safe://hbhyyyn5ox7wd6qyhri8cybrsj7azz4uxmuyhq4e1saxim7fsrjhsqc4fg
+ file.js safe://hbkygydhuquhis85sbu9ek6jhidc7ynbumuxn8nf7s36fau4ob6ge1ho6q
+ file.wasm safe://hbyyyyd5gf4kgeacnapdarhb7kq8nhitwwax3woc9an9xoatrtqt11tn9y
+ file.json safe://hbkygonp7f5b84pdzu7yrqti9gr8hgtjtysyjswa55zpz7jbrfeku9g8hh
+ index.html safe://hbhybyn7rws4pupisrocmx4rnb5k5oh7oawmmwaaton9b96zzrmta85mtc
I load the app, enter the file.json XOR-URL (safe://hbkygonp7f5b84pdzu7yrqti9gr8hgtjtysyjswa55zpz7jbrfeku9g8hh) and it fails to fetch with
Access to fetch at ‘safe://hbkygonp7f5b84pdzu7yrqti9gr8hgtjtysyjswa55zpz7jbrfeku9g8hh/’ from origin ‘safe://hnyynywy171fpi6xxptsbkz7cda5y7w3k7jtpp71h7oacy8ydbkwfgbgkhbnc’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. If an opaque response serves your needs, set the request’s mode to ‘no-cors’ to fetch the resource with CORS disabled.