Examine source code of Sealist

{
  "manifest_version": 2,
  "name": "Sealist",
  "description": "End-to-end encryption for Todoist tasks",
  "version": "1.0.3",
  "icons": {
    "16": "icons/seal-16.png",
    "32": "icons/seal-32.png",
    "48": "icons/seal-48.png",
    "128": "icons/seal-128.png"
  },
  "homepage_url": "https://gitlab.com/yaspltbr/sealist",
  "permissions": [
    "storage",
    "https://app.todoist.com/*",
    "https://api.todoist.com/*"
  ],
  "content_security_policy": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{bf9d72d3-cb95-419e-885b-47939c9311ca}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Sealist",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": false,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://app.todoist.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/content.js"
      ]
    },
    {
      "matches": [
        "https://app.todoist.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/pageWorld.js"
      ],
      "world": "MAIN"
    }
  ]
}