Fill in the blanks

It's sorta like Mad Libs, except a) it's not affiliated with that word game, and b) it (theoretically) works on any webpage

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Fill in the blanks",
  "description": "It's sorta like Mad Libs, except a) it's not affiliated with that word game, and b) it (theoretically) works on any webpage",
  "version": "1.0.0",
  "manifest_version": 3,
  "action": {
    "default_title": "Fill in the blanks!\n\nClick once to start\nClick again when you're done\n"
  },
  "background": {
    "service_worker": "background.js",
    "type": "module"
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "icons": {
    "16": "icon-16x16.png",
    "32": "icon-32x32.png",
    "48": "icon-48x48.png",
    "64": "icon-64x64.png",
    "128": "icon-128x128.png",
    "512": "icon-512x512.png"
  }
}