Examine source code of LinkedOut-Unfollow

{
  "manifest_version": 2,
  "name": "LinkedOut",
  "version": "1.0",
  "description": "Disables auto-following of companies when applying to jobs on LinkedIn",
  "homepage_url": "https://github.com/Killfile/LinkedOut",
  "icons": {
    "48": "icons/linkedout.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icons/linkedout.png",
    "default_title": "LinkedOut"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.linkedin.com/jobs/*"
      ],
      "js": [
        "donotfollow.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8dda7245-36b0-433c-b94a-0cb29a534cf9}"
    }
  }
}