Examine source code of net

{
  "name": "net",
  "description": "Save and share links as a Kanban board",
  "version": "0.0.3.1",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "identity",
    "tabs",
    "storage",
    "contextMenus"
  ],
  "browser_action": {
    "default_icon": {
      "16": "./images/icon16.png",
      "32": "./images/icon32.png",
      "48": "./images/icon48.png",
      "128": "./images/icon128.png"
    },
    "default_title": "Click to Save"
  },
  "chrome_url_overrides": {
    "newtab": "./newtab/index.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "./content_scripts/index.js"
      ]
    }
  ],
  "options_ui": {
    "page": "./options/index.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "./images/icon16.png",
    "32": "./images/icon32.png",
    "48": "./images/icon48.png",
    "128": "./images/icon128.png"
  }
}