Examine source code of Annotier Extension

{
  "manifest_version": 3,
  "name": "Annotier Extension",
  "short_name": "Annotier",
  "version": "1.0",
  "description": "Bring discussions into your browsing — view and edit comments from https://annotier.com/ directly in your sidebar.",
  "icons": {
    "256": "icons/Anntier_v4_round.png"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "https://annotier.com/extension/iframe*"
      ],
      "js": [
        "content_scripts/content-script.js"
      ]
    }
  ],
  "host_permissions": [
    "https://annotier.com/*"
  ],
  "homepage_url": "https://annotier.com/extension",
  "incognito": "not_allowed",
  "developer": {
    "name": "Tonnot UG (haftungsbeschränkt)",
    "url": "https://tonnot.eu/"
  },
  "action": {
    "default_icon": "icons/Anntier_v4_round.png",
    "default_title": "Annotier",
    "default_popup": "popup/annotier_popup.html"
  },
  "sidebar_action": {
    "default_title": "Annotier",
    "browser_style": false,
    "default_panel": "sidebar/sidebar.html",
    "default_icon": "icons/Anntier_v4_round.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@annotier-extension.tonnot-ug",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ]
      }
    }
  }
}