Examine source code of Easy Logger

{
  "manifest_version": 2,
  "name": "Easy Logger",
  "description": "A maneira mais fácil de controlar o console: log, info, warn e error.",
  "version": "1.0.7",
  "permissions": [
    "activeTab",
    "storage",
    "tabs"
  ],
  "content_scripts": [
    {
      "run_at": "document_end",
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "log_48x48.png",
      "128": "log_128x128.png"
    }
  },
  "icons": {
    "48": "log_48x48.png",
    "128": "log_128x128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4d912a39-c98b-4044-8dea-e0ee47864e61}"
    }
  }
}