Examine source code of Figma Mixed Styles

{
  "manifest_version": 2,
  "name": "Figma Mixed Styles",
  "version": "1.0.0",
  "description": "Extract CSS of Figma text nodes with mixed styles",
  "browser_specific_settings": {
    "gecko": {
      "id": "figma-mixed-styles-extension@igoradamenko.com"
    }
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "tabs"
  ],
  "icons": {
    "256": "icon.png"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+S"
      },
      "description": "Open the extension"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.figma.com/*"
      ],
      "js": [
        "figma-bg.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "figma-bridge.js"
  ]
}