Examine source code of CodeFaster

{
  "description": "A power packed productivity tool made with ❤️ by developers for developers.",
  "version": "1.0.4",
  "browser_specific_settings": {
    "gecko": {
      "id": "firefoxeextension0102030434354343553@codefaster.net"
    }
  },
  "manifest_version": 2,
  "name": "Codefaster",
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "background.bundle.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "logo_favicon.png"
  },
  "icons": {
    "128": "logo_favicon_128_128.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "contextMenus",
    "unlimitedStorage",
    "*://localhost/",
    "*://*.codefaster.net/*",
    "*://codefaster.net/*",
    "*://google.com/",
    "*://www.google.com/*",
    "*://google.com/*",
    "*://bing.com/",
    "*://www.bing.com/*",
    "*://bing.com/*",
    "*://duckduckgo.com/",
    "*://www.duckduckgo.com/*",
    "*://duckduckgo.com/*",
    "*://ecosia.org/",
    "*://www.ecosia.org/*",
    "*://ecosia.org/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "http://*/",
        "https://*/*",
        "<all_urls>"
      ],
      "run_at": "document_idle",
      "js": [
        "contentScript.bundle.js"
      ],
      "css": [
        "content.styles.css"
      ]
    },
    {
      "matches": [
        "*://google.com/",
        "*://www.google.com/*",
        "*://google.com/*",
        "*://bing.com/",
        "*://www.bing.com/*",
        "*://bing.com/*",
        "*://duckduckgo.com/",
        "*://www.duckduckgo.com/*",
        "*://duckduckgo.com/*",
        "*://ecosia.org/",
        "*://www.ecosia.org/*",
        "*://ecosia.org/*"
      ],
      "run_at": "document_start",
      "js": [
        "contentBeforeScript.bundle.js"
      ],
      "css": [
        "content.styles.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "content.styles.css",
    "icon-128.png",
    "logo_favicon.png",
    "logo.svg",
    "mock.svg",
    "mock2.svg",
    "left_view.png",
    "right_view.png",
    "body_bg.jpeg",
    "logo.png",
    "logo_favicon.png"
  ]
}