Examine source code of Eye Dropper Pro+

{
  "manifest_version": 2,
  "name": "Eye Dropper Pro+",
  "version": "2.0",
  "description": "A color picker extension with advanced features",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png",
    "256": "icons/icon256.png",
    "512": "icons/icon512.png"
  },
  "permissions": [
    "activeTab",
    "<all_urls>",
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "96": "icons/icon96.png",
      "128": "icons/icon128.png",
      "256": "icons/icon256.png",
      "512": "icons/icon512.png"
    },
    "default_title": "Eye Dropper Pro+",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_scripts/eyedropper.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{65e7c178-4a56-43aa-b26e-abc93e83a904}"
    }
  }
}