Examine source code of Reddit Storage Cleaner

{
  "manifest_version": 3,
  "name": "Reddit Storage Cleaner",
  "version": "1.0",
  "description": "Deletes the 'recent-subreddits-store' key from Reddit's local storage when clicked.",
  "permissions": [
    "scripting",
    "tabs"
  ],
  "host_permissions": [
    "https://www.reddit.com/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "48": "icon.png",
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "reddit@cleaner.com",
      "strict_min_version": "58.0"
    }
  }
}