Advent of Code Part 2 Timer

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Advent of Code Part 2 Timer",
  "version": "1.0.1",
  "description": "Add a column to the personal stats page which displays how long it took you to get from part 1 to part 2",
  "icons": {
    "48": "icons/aoc-timer-48.png",
    "96": "icons/aoc-timer-96.png"
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://adventofcode.com/*/leaderboard/self"
      ],
      "js": [
        "stats.js"
      ]
    },
    {
      "matches": [
        "https://adventofcode.com/*/day/*"
      ],
      "js": [
        "tracker.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "content_security_policy": {}
}