Examine source code of Indic Transliterator

{
  "manifest_version": 2,
  "name": "Indic Transliterator",
  "version": "1.1",
  "author": "Writtik Bhattacharya",
  "homepage_url": "https://github.com/WrittikGithub/indic-transliterator.git",
  "description": "Transliterate between Indic scripts using client-side processing",
  "default_locale": "en",
  "icons": {
    "48": "icons/icon_48.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "contextMenus",
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ],
  "browser_action": {
    "default_icon": "icons/icon_48.png",
    "default_popup": "popup/popup.html"
  },
  "web_accessible_resources": [
    "icons/*",
    "popup/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "indic-transliterator@writtik.github.io"
    }
  }
}