Examine source code of Lightning Tab Groups

{
  "manifest_version": 2,
  "name": "Lightning Tab Groups",
  "version": "0.1.2",
  "homepage_url": "https://gchristensen.github.io/lightning-tab-groups/",
  "description": "Tab group manager for keyboard ninjas.",
  "applications": {
    "gecko": {
      "id": "lightning-tab-groups-we@gchristensen.github.io",
      "strict_min_version": "102.0"
    }
  },
  "icons": {
    "16": "ui/icons/logo.svg",
    "48": "ui/icons/logo.svg",
    "96": "ui/icons/logo.svg",
    "128": "ui/icons/logo.svg"
  },
  "browser_action": {
    "default_title": "Lightning Tab Groups",
    "default_popup": "ui/popup.html"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "chromeos": "Alt+G",
        "linux": "Alt+G",
        "mac": "Alt+G",
        "windows": "Alt+G"
      }
    }
  },
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "options_ui": {
    "page": "ui/options.html",
    "browser_style": true
  },
  "permissions": [
    "<all_urls>",
    "tabs",
    "tabHide",
    "storage",
    "sessions",
    "notifications",
    "clipboardRead",
    "clipboardWrite",
    "webRequest",
    "webRequestBlocking",
    "contextualIdentities",
    "cookies"
  ]
}