Examine source code of JobRelay

{
  "manifest_version": 2,
  "name": "JobRelay",
  "version": "1.2.0",
  "description": "Find hidden jobs, create perfect applications, and land more interviews",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "JobRelay"
  },
  "permissions": [
    "storage",
    "activeTab",
    "tabs",
    "<all_urls>",
    "notifications",
    "alarms"
  ],
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "scripts/content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "panel/*",
    "images/*",
    "fonts/*",
    "assets/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7ed574fb-75b8-45ba-ada5-90e91abb5b1f}"
    }
  }
}