Examine source code of eToro Helper

{
  "author": "ducdevduck & Pascal Bosman",
  "name": "eToro Helper",
  "short_name": "eToro-Helper",
  "description": "Showing spread prices and percentages for a better decision.",
  "version": "1.0.3",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "tabs",
    "*://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.etoro.com/*"
      ],
      "css": [
        "styles/main.css"
      ],
      "js": [
        "scripts/main.js"
      ]
    }
  ],
  "browser_action": {
    "default_title": "eToro Helper",
    "default_icon": "assets/etoro-64x64.png"
  },
  "icons": {
    "32": "assets/etoro-32x32.png",
    "64": "assets/etoro-64x64.png",
    "128": "assets/etoro-128x128.png"
  },
  "manifest_version": 2
}