manifest.json

{

  "description": "Lorem Ipsum",
  "manifest_version": 2,
  "name": "data-uri-test-svg",
  "version": "1.0",
  "homepage_url": "https://example.com",

  "theme": {
    "images": {
      "headerURL": "data:image/png;base64,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"
    },
    
    "colors": {
       "accentcolor": "#ffffff",
       "textcolor": "#000"
    }
  }
}