Halloween Bubble Shooter

To do this match groups of three or more same-coloured bubbles
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manifest.json
{
  "manifest_version": 2,
  "name": "Halloween Bubble Shooter",
  "version": "1.0",
  "description": "To do this match groups of three or more same-coloured bubbles",
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": {
      "48": "images/bubble-logo.png"
    },
    "default_title": "Open Game Popup",
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "images/bubble-logo.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{909086ce-4136-4bce-a443-6705fc3d9f7f}"
    }
  }
}