Examine source code of Syjonizer

{
  "manifest_version": 2,
  "name": "Syjonizer",
  "version": "0.5.2",
  "description": "Odświeża wygląd planu zajęć UMCS Syjon",
  "icons": {
    "32": "icons/syjonizer-32.png",
    "48": "icons/syjonizer-48.png",
    "64": "icons/syjonizer-64.png",
    "96": "icons/syjonizer-96.png"
  },
  "background": {
    "scripts": [
      "syjonizer.js"
    ]
  },
  "page_action": {
    "browser_style": true,
    "default_icon": {
      "32": "icons/syjonizer-32.png",
      "48": "icons/syjonizer-48.png"
    },
    "default_title": "Syjonizer",
    "default_popup": "popup/syjonize.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://moria.umcs.lublin.pl/*"
      ],
      "js": [
        "content_scripts/groups.js",
        "content_scripts/injectCSS.js",
        "content_scripts/removeCSS.js",
        "content_scripts/init.js"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "*://moria.umcs.lublin.pl/*",
    "<all_urls>"
  ],
  "web_accessible_resources": [
    "popup/syjon_style/rollup.css",
    "popup/syjon_style/toolbar.css",
    "popup/syjon_style/pinned.css",
    "popup/syjon_style/extended.css",
    "popup/syjon_style/announcement.css",
    "popup/syjon_scripts/setWeekday.js"
  ]
}