Examine source code of Search Engine Ad Remover

{
  "manifest_version": 2,
  "name": "Search Engine Ad Remover",
  "version": "1.1.4resigned1",
  "description": "Removes ads when searching using Google, Bing, DuckDuckGo, StartPage and Ask!",
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png"
  },
  "applications": {
    "gecko": {
      "id": "@searchengineadremover",
      "strict_min_version": "48.0"
    }
  },
  "background": {
    "scripts": [
      "scripts/prefs-manager.js",
      "scripts/script-injector.js"
    ]
  },
  "options_ui": {
    "page": "prefs/prefs.html"
  },
  "permissions": [
    "storage",
    "tabs",
    "*://*/*"
  ],
  "web_accessible_resources": [
    "scripts/jquery-3.3.1.js"
  ]
}