Examine source code of 2read

{
  "manifest_version": 2,
  "name": "2read",
  "version": "1.8.8",
  "homepage_url": "https://2read.net/",
  "description": "Convert article in current tab to readable form and upload it to IPFS.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab",
    "*://*/*",
    "bookmarks"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "2read"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}