Examine source code of Teams See More

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "version": "1.1.1",
  "default_locale": "en",
  "description": "__MSG_extDescription__",
  "icons": {
    "16": "images/icon16.png",
    "24": "images/icon24.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b26d45fa-ec75-4703-a539-2318aaa7a7fa}"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://teams.microsoft.com/*"
      ],
      "js": [
        "content_event.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "contextMenus"
  ]
}