Current version is v2.0.0
Install it from the Mozilla add-ons here: https://addons.mozilla.org/en-US/firefox/addon/json-editor-ex/
This extension is basically just a wrapper around the awesome open source project JSON Editor Online v0.18.10
The third party files included in this extension are build like this:
$ git clone https://github.com/josdejong/svelte-jsoneditor
$ cd svelte-jsoneditor
$ git checkout v0.18.10
$ npm install
$ npm run build
# These are the 2 files included in this extension
$ ls -l package-vanilla/index.js
$ ls -l package-vanilla/themes/jse-theme-dark.css
