Examine source code of Personal Censor

{
  "manifest_version": 2,
  "name": "Personal Censor",
  "version": "1.3",
  "author": "Crestboz Corporation",
  "description": "Censor webpages with user-defined words.",
  "browser_specific_settings": {
    "gecko": {
      "id": "personal-censor@crestboz.co.jp"
    }
  },
  "icons": {
    "16": "icons/favicon-16x16.png",
    "32": "icons/favicon-32x32.png",
    "64": "icons/favicon-64x64.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "icons/favicon-16x16.png",
      "32": "icons/favicon-32x32.png",
      "64": "icons/favicon-64x64.png"
    },
    "default_title": "Personal censor",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "personal-censor.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "permissions": [
    "storage",
    "tabs"
  ]
}