Disable MS Edge JSON Viewer via Selenium EdgeOptions

Question

A recent Edge update has caused a large number of our Selenium-powered integration tests to fail due to the JSON Viewer, which apparently is now enabled by default. It no longer renders the file content in a simple <pre> but adds a ton of nested <div>s.

Disabling the JSON Viewer would restore functionality, and I suppose it may be possible to do so via the EdgeOptions. However, I have not been able to find out how the option for the JSON Viewer is called.

My config:

EdgeOptions options = new EdgeOptions();

Map<String, Object> prefs = new HashMap<>();
prefs.put("download.default_directory", TMP_DIRECTORY.toString());
prefs.put("download.directory_upgrade", true);
// prefs.put(<enable json viewer>, false); <-- what I would like to add

options
    .setExperimentalOption("prefs", prefs)
    ...

---

EDIT: Solved per Xudong Peng's reply as follows:

EdgeOptions options = new EdgeOptions();

Map<String, Object> prefs = new HashMap<>();
prefs.put("download.default_directory", TMP_DIRECTORY.toString());
prefs.put("download.directory_upgrade", true);

List<String> arguments = new ArrayList<>();
arguments.add("--disable-features=msEdgeJSONViewer");

options
    .setExperimentalOption("prefs", prefs)
    .addArguments(arguments)
    ...

Answer 1

If you want to disable the JSON Viewer in Microsoft Edge with Selenium, just add argument in EdgeOptions, something like this:

options.AddArgument("--disable-features=msEdgeJSONViewer");

You can check if that work in edge://version: