Examine source code of e& Wider Web

{
  "name": "e& Wider Web",
  "version": "0.3.3",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "pgfiphgeeacnokcdbjdpjlmilhmnlihm@etisalat.ae"
    }
  },
  "description": "The first of its kind* autistic-friendly web extension",
  "homepage_url": "https://www.etisalat.ae",
  "icons": {
    "16": "assets/images/icons/icon16.png",
    "48": "assets/images/icons/icon48.png",
    "128": "assets/images/icons/icon128.png"
  },
  "default_locale": "en",
  "permissions": [
    "tabs",
    "storage",
    "webRequest",
    "*://*/*",
    "browserSettings"
  ],
  "browser_action": {
    "default_icon": "assets/images/icons/icon19.png",
    "default_title": "e& Wider Web",
    "default_popup": "popup/index.html"
  },
  "background": {
    "scripts": [
      "./assets/js/background.bundle.js"
    ],
    "persistent": true
  },
  "web_accessible_resources": [
    "options.html",
    "assets/js/app.js",
    "assets/css/styling.css",
    "popup/assets/logo.svg",
    "assets/images/icons/icon48.png",
    "assets/images/icons/icon128.png",
    "assets/images/examples/icon.png",
    "assets/images/examples/tmp2.png",
    "assets/images/examples/arrow.png",
    "assets/images/examples/arrow-circle.png",
    "assets/images/examples/play-icon.png",
    "assets/images/examples/play-icon-white.png",
    "assets/images/examples/etisalat-logo.png",
    "assets/images/examples/carousel-img.jpg",
    "assets/images/examples/pay.svg",
    "assets/images/examples/reload.svg",
    "assets/images/examples/product-tem1.jpg",
    "assets/images/examples/product-tem2.jpg",
    "assets/images/examples/tmp3.png",
    "assets/images/examples/search.png",
    "assets/images/examples/location.png",
    "assets/images/examples/appstore_white.svg",
    "assets/images/examples/appstore_black.svg",
    "assets/images/examples/googleplay_white.svg",
    "assets/images/examples/googleplay_black.svg",
    "assets/images/examples/android.png",
    "assets/images/examples/apple.png",
    "assets/images/examples/huawei.png",
    "assets/images/examples/facebook.png",
    "assets/images/examples/instagram.png",
    "assets/images/examples/linkedln.png",
    "assets/images/examples/twitter.png",
    "assets/images/examples/youtube.png",
    "assets/images/examples/location_map.png",
    "assets/images/examples/filter.svg",
    "assets/fonts/Nunito-Black.woff2",
    "assets/fonts/Nunito-BlackItalic.woff2",
    "assets/fonts/Nunito-Bold.woff2",
    "assets/fonts/Nunito-BoldItalic.woff2",
    "assets/fonts/Nunito-ExtraBold.woff2",
    "assets/fonts/Nunito-ExtraBoldItalic.woff2",
    "assets/fonts/Nunito-ExtraLight.woff2",
    "assets/fonts/Nunito-ExtraLightItalic.woff2",
    "assets/fonts/Nunito-Italic.woff2",
    "assets/fonts/Nunito-Light.woff2",
    "assets/fonts/Nunito-LightItalic.woff2",
    "assets/fonts/Nunito-Regular.woff2",
    "assets/fonts/Nunito-SemiBold.woff2",
    "assets/fonts/Nunito-SemiBoldItalic.woff2",
    "assets/fonts/OpenSans-Bold.woff2",
    "assets/fonts/OpenSans-BoldItalic.woff2",
    "assets/fonts/OpenSans-ExtraBold.woff2",
    "assets/fonts/OpenSans-ExtraBoldItalic.woff2",
    "assets/fonts/OpenSans-Italic.woff2",
    "assets/fonts/OpenSans-Light.woff2",
    "assets/fonts/OpenSans-LightItalic.woff2",
    "assets/fonts/OpenSans-Regular.woff2",
    "assets/fonts/OpenSans-SemiBold.woff2",
    "assets/fonts/OpenSans-SemiBoldItalic.woff2",
    "assets/fonts/Roboto-Black.woff2",
    "assets/fonts/Roboto-BlackItalic.woff2",
    "assets/fonts/Roboto-Bold.woff2",
    "assets/fonts/Roboto-BoldItalic.woff2",
    "assets/fonts/Roboto-Italic.woff2",
    "assets/fonts/Roboto-Light.woff2",
    "assets/fonts/Roboto-LightItalic.woff2",
    "assets/fonts/Roboto-Medium.woff2",
    "assets/fonts/Roboto-MediumItalic.woff2",
    "assets/fonts/Roboto-Regular.woff2",
    "assets/fonts/Roboto-Thin.woff2",
    "assets/fonts/Roboto-ThinItalic.woff2",
    "assets/fonts/Almarai-Regular.woff2",
    "assets/fonts/Almarai-Regular.woff",
    "assets/fonts/Almarai-Bold.woff2",
    "assets/fonts/Almarai-Bold.woff",
    "assets/fonts/AtkinsonHyperlegible-Bold.woff",
    "assets/fonts/AtkinsonHyperlegible-Bold.woff2",
    "assets/fonts/AtkinsonHyperlegible-BoldItalic.woff",
    "assets/fonts/AtkinsonHyperlegible-BoldItalic.woff2",
    "assets/fonts/AtkinsonHyperlegible-Italic.woff",
    "assets/fonts/AtkinsonHyperlegible-Italic.woff2",
    "assets/fonts/AtkinsonHyperlegible-Regular.woff",
    "assets/fonts/AtkinsonHyperlegible-Regular.woff2",
    "assets/fonts/Merriweather24pt-Black.woff",
    "assets/fonts/Merriweather24pt-Black.woff2",
    "assets/fonts/Merriweather24pt-BlackItalic.woff",
    "assets/fonts/Merriweather24pt-BlackItalic.woff2",
    "assets/fonts/Merriweather24pt-Bold.woff",
    "assets/fonts/Merriweather24pt-Bold.woff2",
    "assets/fonts/Merriweather24pt-BoldItalic.woff",
    "assets/fonts/Merriweather24pt-BoldItalic.woff2",
    "assets/fonts/Merriweather24pt-Light.woff",
    "assets/fonts/Merriweather24pt-Light.woff2",
    "assets/fonts/Merriweather24pt-LightItalic.woff",
    "assets/fonts/Merriweather24pt-LightItalic.woff2",
    "assets/fonts/Merriweather24pt-Medium.woff",
    "assets/fonts/Merriweather24pt-Medium.woff2",
    "assets/fonts/Merriweather24pt-MediumItalic.woff",
    "assets/fonts/Merriweather24pt-MediumItalic.woff2",
    "assets/fonts/Merriweather24pt-Regular.woff",
    "assets/fonts/Merriweather24pt-Regular.woff2",
    "assets/fonts/RobotoSerif-Black.woff",
    "assets/fonts/RobotoSerif-Black.woff2",
    "assets/fonts/RobotoSerif-BlackItalic.woff",
    "assets/fonts/RobotoSerif-BlackItalic.woff2",
    "assets/fonts/RobotoSerif-Bold.woff",
    "assets/fonts/RobotoSerif-Bold.woff2",
    "assets/fonts/RobotoSerif-BoldItalic.woff",
    "assets/fonts/RobotoSerif-BoldItalic.woff2",
    "assets/fonts/RobotoSerif-Light.woff",
    "assets/fonts/RobotoSerif-Light.woff2",
    "assets/fonts/RobotoSerif-LightItalic.woff",
    "assets/fonts/RobotoSerif-LightItalic.woff2",
    "assets/fonts/RobotoSerif-Medium.woff",
    "assets/fonts/RobotoSerif-Medium.woff2",
    "assets/fonts/RobotoSerif-MediumItalic.woff",
    "assets/fonts/RobotoSerif-MediumItalic.woff2",
    "assets/fonts/RobotoSerif-Regular.woff",
    "assets/fonts/RobotoSerif-Regular.woff2",
    "assets/json/domain-user-agent.json",
    "assets/json/domain-blacklist.json"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "assets/js/inject.bundle.js"
      ],
      "all_frames": true,
      "run_at": "document_idle"
    },
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "assets/js/inject_ds.bundle.js"
      ],
      "css": [
        "assets/css/inject.css"
      ],
      "all_frames": true,
      "run_at": "document_start"
    }
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; img-src 'self'"
}