此扩展会模糊不包括exclude_matches的网站上的图像和视频。
manifest.json

{
  "name": "hoge",
  "version": "1.0",
  "manifest_version": 3,
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "exclude_matches": ["*://hoge.com/*"],
      "css": [
        "matches.css"
      ]
    }
  ]
}

matches.css

img, video {
  filter: blur(4px);
}