Examine source code of Hide Likes

{
  "description": "Hide likes for a more authentic online experience.",
  "version": "1.0.11",
  "content_security_policy": "script-src 'self'  ; object-src 'self'",
  "name": "Hide Likes",
  "background": {
    "scripts": [
      "background.bundle.js"
    ]
  },
  "permissions": [
    "storage"
  ],
  "optional_permissions": [
    "<all_urls>",
    "tabs",
    "webNavigation"
  ],
  "manifest_version": 2,
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "browser_action": {
    "default_icon": "icon-16.png",
    "default_title": "Hide Likes",
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    "*.css"
  ]
}