Extension for WordHippo Thesaurus(Unofficial)

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Extension for WordHippo Thesaurus(Unofficial)",
  "description": "Chrome extension to select any word on Google Docs or any website to lookup synonyms, antonyms, rhymes, definitions on Word Hippo.",
  "version": "3.0",
  "icons": {
    "16": "images/icons/icon16.png",
    "48": "images/icons/icon48.png",
    "128": "images/icons/icon128.png"
  },
  "browser_action": {
    "default_icon": "images/icons/icon16.png",
    "default_popup": "html/popup.html"
  },
  "background": {
    "scripts": [
      "js/eventPage.js"
    ],
    "persistent": true
  },
  "omnibox": {
    "keyword": "wordhippo"
  },
  "web_accessible_resources": [
    "content.js",
    "content.css"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/content.js"
      ],
      "css": [
        "css/content.css"
      ],
      "all_frames": true
    }
  ],
  "options_page": "html/options.html",
  "permissions": [
    "storage",
    "contextMenus",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ]
}