Examine source code of Context search

{
  "name": "Context search",
  "description": "Search tabs, bookmarks and history. Preview tabs, bookmarks and history with images",
  "version": "1.0",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "contextsearchfunctions.js",
      "background.js"
    ]
  },
  "permissions": [
    "history",
    "bookmarks",
    "tabs",
    "webNavigation",
    "storage",
    "unlimitedStorage",
    "http://*/*",
    "https://*/*"
  ],
  "web_accessible_resources": [
    "modal.css",
    "reset.css",
    "times.svg",
    "clock.svg"
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "icon19.png",
      "38": "icon38.png"
    },
    "default_title": "Context search"
  }
}