Examine source code of MentionIt

{
  "name": "MentionIt",
  "version": "1.0.1",
  "manifest_version": 2,
  "description": "Create engaging quote snippets for social media in one click",
  "homepage_url": "https://www.mentionit.app/",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "tabs",
    "contextMenus"
  ]
}