Examine source code of Window Resizer

{
  "manifest_version": 2,
  "version": "0.1.6",
  "name": "Window Resizer",
  "description": "Resize and align the CURRENT layout to the predefined position with multi monitor support",
  "permissions": [
    "storage"
  ],
  "icons": {
    "16": "data/icons/16.png",
    "19": "data/icons/19.png",
    "32": "data/icons/32.png",
    "38": "data/icons/38.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png",
    "256": "data/icons/256.png",
    "512": "data/icons/512.png"
  },
  "browser_action": {
    "default_popup": "data/popup/index.html"
  },
  "homepage_url": "https://add0n.com/window-resizer.html",
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "layout-0": {
      "description": "Use the first popup alignment to adjust the current window size"
    },
    "layout-1": {
      "description": "Use the second popup alignment to adjust the current window size"
    },
    "layout-2": {
      "description": "Use the third popup alignment to adjust the current window size"
    },
    "layout-3": {
      "description": "Use the forth popup alignment to adjust the current window size"
    },
    "layout-4": {
      "description": "Use the fifth popup alignment to adjust the current window size"
    }
  },
  "options_ui": {
    "page": "data/options/index.html",
    "chrome_style": true
  }
}