Examine source code of Dodo SketchBoard

{
  "manifest_version": 2,
  "name": "Dodo SketchBoard",
  "version": "1.0.0",
  "description": "References . Notes . Easy",
  "browser_action": {
    "default_popup": "scripts/popup.html",
    "default_icon": "images/icon-128.png"
  },
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser-specific-settings": {
    "gecko": {
      "id": "dodosketch@candyisacat.com",
      "strict_min_version": "58.0"
    }
  },
  "permissions": [
    "tabs"
  ],
  "content_scripts": [
    {
      "js": [
        "scripts/content.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{85d5c26e-911c-441a-b698-ba1e7df276e1}"
    }
  }
}