Examine source code of Twitch Sidebar+

{
  "manifest_version": 2,
  "name": "Twitch Favorite Streamer",
  "version": "0.2.0",
  "description": "Ajoute une section 'Chaînes favoris' dans la sidebar Twitch et un bouton pour gérer tes favoris.",
  "permissions": [
    "storage",
    "https://www.twitch.tv/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icon.png",
    "128": "icon.png"
  },
  "browser_action": {
    "default_title": "Favorite Streamer",
    "default_icon": {
      "48": "icon.png",
      "128": "icon.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.twitch.tv/*"
      ],
      "js": [
        "content/common.js",
        "content/sidebar.js",
        "content/streamPage.js"
      ],
      "css": [
        "content/styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "favoritestreamer@local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}