Examine source code of Atomic CSS Devtools

{
  "manifest_version": 2,
  "name": "Atomic CSS Devtools",
  "description": "A devtool panel for debugging Atomic CSS rules as if they were not atomic",
  "version": "0.0.9",
  "short_name": "Atomic CSS Devtools",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "author": "@astahmer_dev",
  "homepage_url": "https://github.com/astahmer/atomic-css-devtools",
  "developer": {
    "name": "@astahmer_dev",
    "url": "https://twitter.com/astahmer_dev"
  },
  "permissions": [],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "devtools_page": "devtools.html",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{cb0a79df-f8d2-4808-99aa-51d66f59ac31}"
    }
  }
}