Examine source code of ScreenDemos

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.5.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "https://screendemos.com/*"
  ],
  "default_locale": "en",
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Alt+O"
      },
      "description": "__MSG_toggleSidePanel__"
    },
    "stop-recording": {
      "suggested_key": {
        "default": "Alt+Shift+R"
      },
      "description": "__MSG_stopRecording__"
    }
  },
  "web_accessible_resources": [
    "cursor/*",
    "content-scripts/content.css"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "ScreenDemos"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_action": {},
  "browser_specific_settings": {
    "gecko": {
      "id": "{3abda17b-83b9-4c96-90aa-70ad51f40b96}"
    }
  }
}