Examine source code of BB Kurse FU

{
  "manifest_version": 2,
  "name": "BB Kurse FU",
  "version": "1.1.1",
  "author": "adno",
  "description": "Sortiert FU Blackboard Kurse automatisch nach den Semestern. Für fu-berlin.blackboard.com ",
  "homepage_url": "https://github.com/ITadno/BB-Kurse-FU",
  "icons": {
    "32": "icons/32x32.png",
    "96": "icons/96x96.png",
    "128": "icons/128x128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://fu-berlin.blackboard.com/webapps/portal/execute/tabs/tabAction?tab_tab_group_id=_2_1*"
      ],
      "js": [
        "sort/sortCourses.js"
      ],
      "css": [
        "sort/sort.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background/download.js"
    ]
  },
  "options_ui": {
    "page": "popups/options.html",
    "browser_style": true
  },
  "permissions": [
    "storage",
    "downloads"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "bb-kurse-fu-berlin@adno"
    }
  },
  "web_accessible_resources": [
    "*.css",
    "*.svg"
  ],
  "page_action": {
    "browser_style": true,
    "show_matches": [
      "*://fu-berlin.blackboard.com/webapps/portal/execute/tabs/tabAction?tab_tab_group_id=_2_1*",
      "*://fu-berlin.blackboard.com/webapps/blackboard/content/listContent.jsp*"
    ],
    "default_icon": "icons/96x96.png",
    "default_title": "BB Kurse FU",
    "default_popup": "popups/options.html"
  }
}