Character Count Tool

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Character Count Tool",
  "description": "Count character in selected area",
  "version": "1.0.8",
  "icons": {
    "128": "icon_128.png"
  },
  "browser_action": {
    "default_icon": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "main.css"
      ],
      "js": [
        "jquery-2.2.4.min.js",
        "main.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "offline_enabled": true,
  "permissions": [
    "activeTab"
  ]
}