Examine source code of IngredientsPls

{
  "name": "IngredientsPls",
  "version": "0.0.0.4",
  "description": "Skip the word salad and get to the meaty stuff. Icon made by photo3idea_studio from www.flaticon.com.",
  "manifest_version": 2,
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_icon": "images/fried-32.png",
    "default_title": "IngredientsPls",
    "default_popup": "popup/popup_default.html"
  },
  "icons": {
    "16": "images/fried-16.png",
    "32": "images/fried-32.png",
    "48": "images/fried-48.png",
    "128": "images/fried-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content_scripts/ingredient_scroll.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ingredientspls@lbello10"
    }
  }
}