Examine source code of Stylus

{
  "name": "Stylus",
  "version": "2.4.4",
  "minimum_chrome_version": "86",
  "description": "__MSG_description__",
  "homepage_url": "https://github.com/openstyles/stylus",
  "manifest_version": 2,
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "alarms",
    "contextMenus",
    "storage",
    "tabs",
    "unlimitedStorage",
    "webNavigation",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "page": "background.html"
  },
  "commands": {
    "openManage": {
      "description": "__MSG_openManage__"
    },
    "reload": {
      "description": "__MSG_reload__"
    },
    "toggleTab": {
      "description": "__MSG_toggleCurrentTab__"
    },
    "styleDisableAll": {
      "description": "__MSG_disableAllStyles__"
    },
    "_execute_browser_action": {}
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true,
      "match_origin_as_fallback": true,
      "js": [
        "js/apply.js"
      ]
    },
    {
      "matches": [
        "https://userstyles.org/*"
      ],
      "run_at": "document_start",
      "js": [
        "js/hook-uso.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "16": "icon/16w.png",
      "19": "icon/19w.png",
      "32": "icon/32w.png",
      "38": "icon/38w.png"
    },
    "default_title": "Stylus",
    "default_popup": "popup.html"
  },
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{7a7a4a92-a2a0-41d1-9fd7-1e92480d612d}",
      "strict_min_version": "68.0"
    }
  },
  "options_ui": {
    "page": "manage.html",
    "open_in_tab": true
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_icon": {
      "16": "icon/16.png",
      "19": "icon/19.png",
      "32": "icon/32.png",
      "38": "icon/38.png"
    },
    "open_at_install": false
  }
}