Examine source code of Readwok: split and read

{
  "name": "Readwok: split and read",
  "description": "Split and read web page incrementally with the paragraph reader. Improve your reading comprehension.",
  "version": "1.0",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab"
  ],
  "icons": {
    "16": "/images/icon/logo_16.png",
    "32": "/images/icon/logo_32.png",
    "48": "/images/icon/logo_48.png",
    "128": "/images/icon/logo_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "./content.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "/images/icon/logo_128.png"
  }
}