Examine source code of +Roam

{
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon-128.png",
    "default_title": "+Roam"
  },
  "name": "+Roam",
  "description": "Save snippets to Roam Research - A tool by Ness Labs",
  "homepage_url": "https://nesslabs.com/roam-research-bookmarklet",
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "activeTab"
  ],
  "version": "0.1",
  "manifest_version": 2
}