Examine source code of Sticky Window Containers

{
  "manifest_version": 2,
  "name": "Sticky Window Containers",
  "version": "1.0.4",
  "author": "Yiannis Chronakis",
  "description": "Tabs open in the same container as the first tab in the window.",
  "icons": {
    "48": "icons/sticky-window-containers.svg",
    "96": "icons/sticky-window-containers.svg"
  },
  "background": {
    "scripts": [
      "swc-background.js"
    ]
  },
  "permissions": [
    "<all_urls>",
    "contextualIdentities",
    "cookies",
    "tabs",
    "webNavigation"
  ]
}