fire fox extension edit home page

quick question i would like to make an extension/plug-in that will display a list of data on the home / new tab on firefox but i cant for the life of me work out what the content_scripts -> matches pram should be.

{
    "manifest_version": 2,
    "name": "WCO-Stream-List",
    "version": "1.0",
  
    "description": "Display to watch list",
  
    "icons": {
      "48": "icons/border-48.png"
    },
  
    "content_scripts": [
      {
        **"matches": ["about:home"],** 
        "js": ["wcostreamlist.js"]
      }
    ],
    "browser_specific_settings": {
        "gecko": {
          "id": "[email protected]"
        }
      }
  
  }

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