Hightlight new comments on Reddit

On Reddit, this add-on highlight new comments, written after your last visit in the submission.

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Additional files are visible only to premium users

manifest.json

{
  "manifest_version": 2,
  "name": "New comments on reddit",
  "version": "1.3",
  "description": "Highlight new comments on reddit",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "*://*.reddit.com/*",
    "storage"
  ],
  "applications": {
    "gecko": {
      "id": "{582133bb-563e-4f7a-a54c-4948256a8efc}",
      "strict_min_version": "54.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.reddit.com/*/comments/*"
      ],
      "run_at": "document_end",
      "js": [
        "browser-polyfill.min.js",
        "comments.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html"
  }
}