Examine source code of Substitoot

{
  "description": "Loads missing replies to boosted toots directly from the source server.",
  "manifest_version": 2,
  "name": "Substitoot — improved Mastodon federation",
  "short_name": "Substitoot",
  "author": "virtulis",
  "version": "0.7.2.0",
  "homepage_url": "https://github.com/virtulis/substitoot",
  "icons": {
    "48": "static/logo48.png",
    "128": "static/logo.png"
  },
  "permissions": [
    "storage",
    "scripting"
  ],
  "optional_permissions": [
    "https://*/*"
  ],
  "options_ui": {
    "page": "static/options.html",
    "browser_style": true
  },
  "background": {
    "scripts": [
      "dist/background.js"
    ]
  },
  "web_accessible_resources": [
    "dist/inject.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "substitoot@kludge.guru"
    }
  },
  "browser_action": {
    "default_title": "Substitoot",
    "default_area": "navbar"
  }
}