Examine source code of Poshmark Feed Filter

{
  "manifest_version": 3,
  "name": "Poshmark Feed Filter",
  "short_name": "pm_editor Filter",
  "version": "1.1",
  "description": "Removes posts from 'pm_editor' and spam notifications in Poshmark's News feed.",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://poshmark.com/news*",
    "https://www.poshmark.com/news*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://poshmark.com/news*",
        "https://www.poshmark.com/news*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_title": "Poshmark Filter Active"
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "wilbur85-poshm_filter@yahoo.com",
      "strict_min_version": "109.0"
    }
  }
}