backspace to back

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "backspace to back",
  "version": "0.1.0",
  "manifest_version": 2,
  "description": "map backspace to history.go(-1)",
  "homepage_url": "https://github.com/zhuangya/backspace-to-back",
  "browser_action": {
    "default_icon": "icons/icon-128.png",
    "default_title": "backspace to back"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*"
  ]
}