Examine source code of Bookmark Notes

{
  "manifest_version": 2,
  "name": "Bookmark Notes",
  "description": "Store notes with bookmarks, a la pre-Firefox-62",
  "version": "1.2.2resigned1",
  "developer": {
    "name": "Jase",
    "url": "https://github.com/emmyemi/bookmark-notes"
  },
  "applications": {
    "gecko": {
      "id": "bookmark-notes@winter.coffee",
      "strict_min_version": "60.0"
    }
  },
  "permissions": [
    "bookmarks",
    "storage"
  ],
  "optional_permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Open Bookmark Notes",
    "default_icon": {
      "38": "img/icon.png"
    }
  },
  "sidebar_action": {
    "default_title": "Bookmark Notes",
    "default_panel": "pages/panel.html",
    "default_icon": "img/icon.png"
  },
  "options_ui": {
    "browser_style": true,
    "page": "pages/options.html"
  }
}