Examine source code of Simple = Select + Search

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "3.0.2",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "storage",
    "contextMenus",
    "alarms"
  ],
  "default_locale": "en",
  "host_permissions": [
    "https://simpleselectsearch.com/*"
  ],
  "action": {
    "default_icon": {
      "16": "icon/16.png",
      "32": "icon/32.png"
    },
    "default_title": "Simple = Select + Search",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "firefox@simpleselectsearch.com",
      "strict_min_version": "126.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_icon": "icon/sidebar-left.svg",
    "default_title": "Simple = Select + Search"
  }
}