Examine source code of english dictionary c

{
  "manifest_version": 2,
  "name": "Sinhala English Learner’s Dictionary",
  "description": "Lookup Sinhala words from the SELD",
  "version": "0.4.6",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png",
    "256": "icon-256.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "https://translate.google.com/*"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; media-src 'self' data: https://translate.google.com;",
  "web_accessible_resources": [
    "SELD/SELD.idx",
    "SELD/SELD.dict",
    "assets/fonts/*.ttf",
    "content-scripts/content.css",
    "abbreviations.json"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1a071cff-9d52-4e0b-a449-a345b75887b7}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Sinhala-English Learner's Dictionary (experimental)",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}