Examine source code of Instaguest

{
  "manifest_version": 2,
  "name": "Instaguest",
  "version": "1.21",
  "description": "This little addon allow you to be free on Instagram when you are not logged in. It simply remove the login pannel & that grey background which makes it impossible for you to continue.",
  "icons": {
    "48": "icons/logo48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.instagram.com/*"
      ],
      "js": [
        "traitement.js",
        "html/set_color.js"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "tabs",
    "cookies",
    "storage",
    "*://*.instagram.com/*"
  ],
  "background": {
    "scripts": [
      "html/bg.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/logo48.png",
    "default_title": "Instaguest",
    "default_popup": "html/choose_color.html"
  },
  "options_ui": {
    "page": "html/option/index.html",
    "browser_style": true
  }
}