Examine source code of StockBeeHideUsers

{
  "description": "Hide posts by certain users from StockBee timeline.",
  "manifest_version": 2,
  "name": "StockBeeHideUsers",
  "version": "1.4",
  "homepage_url": "https://github.com/mdn/webextensions-examples/tree/master/borderify",
  "icons": {
    "48": "icons/border-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "stockbeehideuserstimeline@example.com",
      "strict_min_version": "42.0"
    }
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.stockbee.biz/*"
      ],
      "js": [
        "stockbeehideusers.js"
      ]
    }
  ]
}