Examine source code of Locki

{
  "manifest_version": 3,
  "name": "Locki",
  "description": "Protect PII and sensitive information in any web app. Professional-grade encryption that fits perfectly into your team's workflow.",
  "version": "2.0.4",
  "icons": {
    "48": "images/icon-48.png",
    "96": "images/icon-96.png",
    "128": "images/icon-128.png",
    "256": "images/icon-256.png",
    "512": "images/icon-512.png"
  },
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{3f9d2b1a-6c4e-4f1b-9a8e-7d2c5e6f1b0a}"
    }
  },
  "permissions": [
    "storage",
    "contextMenus",
    "tabs"
  ],
  "background": {
    "scripts": [
      "./src/service-worker.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "./src/content.js"
      ],
      "css": [
        "./src/content.css"
      ],
      "matches": [
        "https://*/*",
        "http://*/*"
      ],
      "run_at": "document_end",
      "all_frames": true,
      "exclude_matches": [
        "https://docs.google.com/document/*"
      ]
    },
    {
      "matches": [
        "https://docs.google.com/document/*"
      ],
      "js": [
        "src/gDocs-content.js"
      ],
      "css": [
        "./src/gDocs-content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "images/*"
      ],
      "matches": [
        "https://*/*",
        "http://*/*"
      ]
    },
    {
      "resources": [
        "src/gDocs-injected.js"
      ],
      "matches": [
        "https://docs.google.com/*"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html"
  }
}