Examine source code of Tab Session Manager

{
  "manifest_version": 2,
  "name": "Tab Session Manager",
  "version": "1.0.0",
  "description": "Save and restore browser sessions easily.",
  "author": "Tab Session Manager Team",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "sessions"
  ],
  "background": {
    "scripts": [
      "session.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Tab Session Manager",
    "default_popup": "popup/popup.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tab-session-manager-4e7c@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}