Base64 Encoder & Decoder

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Base64 Encoder & Decoder",
  "short_name": "Base64",
  "description": "Encode and decode the selected word",
  "version": "1.0.2",
  "minimum_chrome_version": "38",
  "permissions": [
    "contextMenus",
    "storage",
    "tabs"
  ],
  "icons": {
    "16": "assets/icon16.png",
    "24": "assets/icon24.png",
    "32": "assets/icon32.png",
    "48": "assets/icon48.png",
    "64": "assets/icon64.png"
  },
  "background": {
    "page": "background.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  }
}