System Font Everywhere

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "System Font Everywhere",
  "short_name": "SF Everywhere",
  "version": "0.0.3",
  "description": "Use system font on the web",
  "action": {
    "default_title": "System Font Everywhere",
    "default_icon": "off-icon.png"
  },
  "background": {
    "service_worker": "background.js"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "content_scripts": [
    {
      "all_frames": true,
      "match_about_blank": true,
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start",
      "exclude_globs": [
        "*/chrome/newtab*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "icons": {
    "128": "128.png"
  }
}