Image To Base64

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Image To Base64",
  "version": "1.0.0",
  "description": "Convert local image file to base64 data.",
  "browser_action": {
    "default_popup": "popup/index.html",
    "default_title": "Begin to convert image to Base64"
  },
  "icons": {
    "16": "./assets/icon16.png",
    "48": "./assets/icon48.png",
    "128": "./assets/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval' 'sha256-...='; object-src 'self'"
}