Examine source code of MVP Activity Tracker

{
  "manifest_version": 2,
  "name": "MVP Activity Tracker",
  "short_name": "MVP Activity",
  "description": "Add activity to your MVP profile.",
  "version": "0.1.2.1resigned1",
  "author": "Kevin Jones (@vcsjones)",
  "minimum_chrome_version": "48",
  "minimum_edge_version": "33.14281.1000.0",
  "applications": {
    "gecko": {
      "id": "kevin@vcsjones.com",
      "strict_min_version": "48.0"
    }
  },
  "icons": {
    "16": "images/16.png",
    "32": "images/32.png",
    "48": "images/48.png",
    "128": "images/128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Add Activity",
    "default_icon": {
      "19": "images/19.png",
      "38": "images/38.png"
    }
  },
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  }
}