Examine source code of 99Stalker

{
  "name": "99Stalker",
  "short_name": "99Stalker",
  "version": "0.5.5.0",
  "version_name": "0.5.5.0 beta",
  "description": "99Damage Liga FaceIt und MatchMaking ELO",
  "author": "axXez",
  "homepage_url": "https://axxez.eu/media#99stalker",
  "icons": {
    "16": "icons/99stalker_icon_16.png",
    "32": "icons/99stalker_icon_32.png",
    "48": "icons/99stalker_icon_48.png",
    "64": "icons/99stalker_icon_64.png",
    "128": "icons/99stalker_logo_128.png",
    "256": "icons/99stalker_logo_256.png"
  },
  "minimum_chrome_version": "73.0.0.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{021225af-c052-4ea6-a128-f94f10cf1148}",
      "strict_min_version": "70.0"
    }
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "https://liga.99damage.de/*",
    "https://liga.esl-meisterschaft.de/*",
    "https://open.faceit.com/*",
    "https://csgostats.gg/*"
  ],
  "web_accessible_resources": [
    "images/*",
    "webfonts/*",
    "icons/*"
  ],
  "background": {
    "scripts": [
      "uint64.min.js",
      "controller.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "css": [
        "webfonts/fontawesome.min.css",
        "style.css"
      ],
      "js": [
        "jquery-3.5.1.min.js"
      ],
      "matches": [
        "https://liga.99damage.de/*leagues/*",
        "https://liga.esl-meisterschaft.de/*leagues/*"
      ],
      "run_at": "document_start"
    },
    {
      "js": [
        "pages/team.js"
      ],
      "matches": [
        "https://liga.99damage.de/*leagues/teams/*",
        "https://liga.esl-meisterschaft.de/*leagues/teams/*"
      ]
    },
    {
      "js": [
        "pages/match.js"
      ],
      "matches": [
        "https://liga.99damage.de/*leagues/matches/*",
        "https://liga.esl-meisterschaft.de/*leagues/matches/*"
      ]
    },
    {
      "js": [
        "pages/group.js"
      ],
      "matches": [
        "https://liga.99damage.de/*leagues/*/group/*",
        "https://liga.esl-meisterschaft.de/*leagues/*/group/*"
      ]
    },
    {
      "js": [
        "pages/participants.js"
      ],
      "matches": [
        "https://liga.99damage.de/*leagues/*/participants*",
        "https://liga.esl-meisterschaft.de/*leagues/*/participants*"
      ]
    },
    {
      "js": [
        "pages/playoffs.js"
      ],
      "matches": [
        "https://liga.99damage.de/*leagues/*/playoff*",
        "https://liga.esl-meisterschaft.de/*leagues/*/playoff*"
      ]
    }
  ],
  "manifest_version": 2
}