Esperanto

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Esperanto",
  "description": "A plugin for learning languages",
  "version": "1.2",
  "browser_action": {
    "default_icon": "128-square.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "16-square.png",
    "48": "48-square.png",
    "128": "128-square.png"
  },
  "content_scripts": [
    {
      "js": [
        "mark.min.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ],
  "options_page": "options.html",
  "permissions": [
    "storage",
    "tabs",
    "<all_urls>"
  ]
}