Same issue.

On Windows 10 Version 1607, Download file to root of partition

Yep, As i know, Most of Chrome extension works fine in Opera

So the extension author(s) officially say that the extension supports Opera? I don't see such extension in Opera's addons page so it seems to not be officially supported.

Not officially support. But i think you also know Opera have same layout engine, same dev tools....at least...Look's same.
I never see there have any special feature for Opera's dev tools, so... It they just use origin code of Chromium dev tools, this extension should work. or may i miss something like namespace...

It's a Chrome extension.

And it's supports Opera?

@leocg Yep, As i know, Most of Chrome extension works fine in Opera, except "Chrome Application", And... I don't know Opera even modified DevTools...

@leocg Nope. It's a Chrome extension.

My friend tell me this extension can highlight JSX file in DevTools > Source panel, My Opera already installed this extension with latest version. But all JSX source code is plain text format.
I have tested in Chrome just now, JSX source highlight works fine.

So, Anybody know why? Opera team removed this feature?