Examine source code of WebRTC Control

{
  "version": "0.2.8",
  "manifest_version": 2,
  "name": "WebRTC Control",
  "short_name": "webrtc-control",
  "homepage_url": "https://mybrowseraddon.com/webrtc-control.html",
  "description": "Have control over WebRTC (disable | enable) and protect your IP address.",
  "options_ui": {
    "open_in_tab": true,
    "page": "data/options/options.html"
  },
  "permissions": [
    "privacy",
    "storage",
    "<all_urls>",
    "contextMenus"
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "lib/config.js",
      "lib/chrome.js",
      "lib/runtime.js",
      "lib/common.js"
    ]
  },
  "browser_action": {
    "default_title": "WebRTC Control",
    "default_icon": {
      "16": "data/icons/16.png",
      "32": "data/icons/32.png",
      "48": "data/icons/48.png",
      "64": "data/icons/64.png"
    }
  },
  "content_scripts": [
    {
      "all_frames": true,
      "run_at": "document_start",
      "js": [
        "data/content_script/inject.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*",
        "ftp://*/*"
      ]
    }
  ],
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png"
  }
}