Examine source code of Inline Search

{
  "applications": {
    "gecko": {
      "id": "inlinesearch.ahh.kohd@gmail.com"
    }
  },
  "name": "Inline Search",
  "version": "0.0.7resigned1",
  "manifest_version": 2,
  "description": "Use your favourite search engines on the fly without having to open new tab.",
  "homepage_url": "http://github.com/ahkohd",
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "css": [
        "inline.min.css"
      ],
      "js": [
        "interact.min.js",
        "inline.min.js"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    "redirect.html"
  ],
  "browser_action": {
    "default_icon": "icons/icon48.png",
    "default_popup": "./src/popup.html"
  },
  "default_locale": "en",
  "options_ui": {
    "page": "src/options_custom/index.html",
    "open_in_tab": false
  },
  "permissions": [
    "contentSettings",
    "tabs",
    "storage",
    "*://*/*"
  ]
}