Examine source code of SideBar-Apps and Bookmark Manager

{
  "manifest_version": 2,
  "name": "SideBar-Apps and Bookmark Manager",
  "author": "Freelancer Reaz",
  "version": "0.0.2",
  "description": "Hidden Sidebar with apps and bookmarks that appear in one move. Organize bookmarks and apps with customized sidebar",
  "icons": {
    "16": "icons/logo16.png",
    "32": "icons/logo32.png",
    "64": "icons/logo64.png",
    "128": "icons/logo128.png"
  },
  "browser_action": {
    "default_icon": "icons/logo128.png",
    "default_popup": "html/popup.html"
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "activeTab"
  ],
  "minimum_chrome_version": "55",
  "background": {
    "scripts": [
      "app/background.js"
    ]
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "app/contentscript.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*",
        "<all_urls>"
      ],
      "run_at": "document_idle"
    }
  ]
}