Examine source code of Leak Detector

{
  "manifest_version": 2,
  "name": "Leak Detector",
  "description": "An add-on that detects and warns you against personal data exfiltration",
  "version": "1.0.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "leak.siesta121@simplelogin.com",
      "data_collection_permissions": {
        "user_data": [
          "none"
        ],
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icons/logo_48.png"
  },
  "browser_action": {
    "default_icon": "icons/logo.png",
    "default_popup": "extension_ui/html/popup.html"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "webNavigation",
    "activeTab",
    "tabs",
    "storage",
    "wss://*/",
    "*://*/*"
  ],
  "content_scripts": [
    {
      "js": [
        "content_scripts/fathom/fathom.js",
        "content_scripts/fathom/email_detector.js",
        "content_scripts/autofill/heuristicsRegexp.js",
        "content_scripts/autofill/FormAutofill.js",
        "content_scripts/autofill/CreditCard.js",
        "content_scripts/autofill/FormAutofillUtils.js",
        "content_scripts/autofill/FormAutofillHeuristics.js",
        "content_scripts/isShown.js",
        "content_scripts/pii_fields_detection.js",
        "content_scripts/content_script.js"
      ],
      "matches": [
        "*://*/*"
      ],
      "all_frames": true,
      "run_at": "document_idle"
    }
  ],
  "background": {
    "persistent": true,
    "scripts": [
      "background_scripts/tracker/tracker.js",
      "data/ddg_tds.js",
      "background_scripts/background.js",
      "data/entities.js",
      "data/public_suffix.js",
      "background_scripts/tracker/psl.js",
      "background_scripts/background_utils.js",
      "background_scripts/leak_detector/base64.js",
      "background_scripts/leak_detector/lzstring.js",
      "background_scripts/leak_detector/md2.js",
      "background_scripts/leak_detector/md4.js",
      "background_scripts/leak_detector/md5.js",
      "background_scripts/leak_detector/sha1.js",
      "background_scripts/leak_detector/sha256.js",
      "background_scripts/leak_detector/sha512.js",
      "background_scripts/leak_detector/custom_map.js",
      "background_scripts/leak_detector/sha_salted.js",
      "background_scripts/leak_detector/leak_detector.js"
    ]
  },
  "web_accessible_resources": [
    "page_scripts/*",
    "content_scripts/*",
    "data/*",
    "icons/*",
    "extension_ui/*",
    "background_scripts/tracker/psl.js",
    "background_scripts/tracker/tracker.js"
  ]
}