Examine source code of Instant Meme Captioner

{
  "manifest_version": 2,
  "name": "Instant Meme Captioner",
  "version": "1.0",
  "description": "Thêm caption meme nhanh chóng cho ảnh.",
  "permissions": [
    "activeTab",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c295c095-5051-4b68-9079-23b967cb71b5}"
    }
  }
}