Examine source code of Share to Mastodon

{
  "manifest_version": 3,
  "name": "Share to Mastodon",
  "version": "2.2",
  "author": "Corbin Davenport",
  "homepage_url": "https://github.com/corbindavenport/share-to-mastodon",
  "description": "Share links to Mastodon in one click",
  "options_ui": {
    "page": "settings.html",
    "open_in_tab": true
  },
  "action": {
    "default_icon": {
      "32": "img/icon_x32.png",
      "48": "img/icon_action_x48.png",
      "128": "img/icon_action_x128.png"
    },
    "default_title": "Share this page to Mastodon"
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      },
      "description": "Share current page on Mastodon"
    }
  },
  "permissions": [
    "contextMenus",
    "storage",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4f049aab-274c-4a9b-8813-84b40b7d5ec4}",
      "strict_min_version": "106.0"
    }
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "icons": {
    "32": "img/icon_x32.png",
    "48": "img/icon_x48.png",
    "128": "img/icon_x128.png"
  }
}