Doggoify

Converts any instance of the word 'dog' to 'doggo,' as well as any instance of the word 'cat' to 'kitty,' overall improving your browsing experience.
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manifest.json
{
  "manifest_version": 2,
  "name": "Doggoify",
  "version": "1.1.1",
  "description": "Converts any instance of the word 'dog' to 'doggo,' as well as any instance of the word 'cat' to 'Kitty,' overall improving your browsing experience.",
  "icons": {
    "48": "doggo.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "script_or_something.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "16": "doggo_smol1.png",
      "32": "doggo_smol2.png"
    }
  }
}