Examine source code of Gender Simplifier

{
  "manifest_version": 2,
  "name": "Gender Simplifier",
  "version": "1.1",
  "description": "An addon that removes gender forms for better readability.",
  "icons": {
    "16": "./icons/icon-16.png",
    "24": "./icons/icon-24.png",
    "48": "./icons/icon-48.png",
    "96": "./icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "compaszer@gmail.com",
      "strict_min_version": "48.0"
    }
  },
  "applications": {
    "gecko": {
      "id": "compaszer@gmail.com"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "filter.js"
      ]
    }
  ]
}