Examine source code of Tiled Tab Groups

{
  "manifest_version": 2,
  "name": "Tiled Tab Groups",
  "description": "Compact tab groups management",
  "version": "0.18.28",
  "icons": {
    "16": "icons/logo/logo-16.png",
    "32": "icons/logo/logo-32.png",
    "64": "icons/logo/logo-64.png"
  },
  "commands": {
    "cycle-next-group": {
      "description": "Cycle to next group"
    },
    "cycle-previous-group": {
      "description": "Cycle to previous group"
    },
    "open-panorama": {
      "suggested_key": {
        "default": "F2"
      },
      "description": "Open Tab Group view"
    },
    "_execute_browser_action": {
      "description": "Open Groups Panel"
    }
  },
  "applications": {
    "gecko": {
      "id": "{dcdaadfa-21f1-4853-9b34-aad681fff6f3}",
      "strict_min_version": "65.0a1"
    }
  },
  "background": {
    "scripts": [
      "external/js-syncqueue/src.js",
      "external/we-tabcache/src.js",
      "js/const.js",
      "js/menu.js",
      "js/groupInterface.js",
      "js/tabCatch.js",
      "js/migrate.js",
      "js/bgViews.js",
      "js/background.js",
      "js/util.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/logo/logo-16.png",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "tabs",
    "sessions",
    "downloads",
    "tabHide",
    "storage",
    "webNavigation",
    "menus",
    "menus.overrideContext",
    "bookmarks"
  ]
}