Does not format JSON files

[KoCMoHaBTa]

When loading a local json file into Safari - the extension does not appear to work.

Steps to reproduce:

1. Create a json file on your computer
2. Open safari and Drag & Drop the file to the address bar
3. The file is loaded into Safari

Expected Results: The loaded file should be formatted using JSON View extension

Actual Results: The loaded file is shown as plain text

[fanpyi]

yes,I have the same problem.