Hide LeetCode Difficulty

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Hide LeetCode Difficulty",
  "version": "2.0",
  "description": "Hide the difficulty of problems on LeetCode",
  "content_scripts": [
    {
      "matches": [
        "https://leetcode.com/problemset/all/",
        "https://leetcode.com/problems/*"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "128": "icon_128.png"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "storage",
    "tabs",
    "webRequest",
    "https://leetcode.com/graphql",
    "https://leetcode.com/problems/*/submit/"
  ]
}