Examine source code of AutoTimeframeColors

{
  "manifest_version": 2,
  "name": "AutoTimeframeColors",
  "version": "1.5",
  "author": "Tiqur",
  "description": "Changes line color according to current timeframe",
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.tradingview.com/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "autotimeframecolors@example.com"
    }
  }
}