火狐浏览器需要手动删除
If you accidentally checked the wrong box while installing Skype, you now are the proud recipient of an extension in Firefox that you can’t uninstall. Sure, you can disable it… but what about uninstalling it?
如果您在安装Skype时不小心选中了错误的框，那么现在您将成为无法卸载的Firefox扩展的骄傲。 当然，您可以禁用它…但是如何卸载它呢？
You could completely uninstall Skype, and then reinstall it without checking the button, but there’s a simpler (and more geeky) method.
您可以完全卸载Skype，然后在不检查按钮的情况下重新安装它，但是有一个更简单(也更怪异)的方法。
Removing Skype Extension Manually
手动删除Skype扩展名
The first thing you want to do is go into Tools \ Add-ons and disable the extension if you haven’t already. You’ll notice that there’s no uninstall option, which is rather irritating… Skype is very useful, but it shouldn’t pollute my Firefox.
您要做的第一件事是进入Tools \ Add-ons并禁用扩展(如果尚未安装)。 您会注意到没有卸载选项，这很烦人……Skype非常有用，但它不应该污染我的Firefox。
Now close Firefox and open up a Windows Explorer window and browse down to the following location, adjusting if you installed Firefox somewhere else:
现在关闭Firefox并打开Windows资源管理器窗口，然后向下浏览至以下位置，以调整是否在其他地方安装了Firefox：
C:\Program Files\Mozilla Firefox\extensions
C：\ Program Files \ Mozilla Firefox \ extensions
In that folder you’ll find another folder with the following name:
在该文件夹中，您将找到另一个具有以下名称的文件夹：
{B13721C7-F507-4982-B2E5-502A71474FED}
{B13721C7-F507-4982-B2E5-502A71474FED}
Just delete that folder (or move it somewhere else if you want to be safe), and then open Firefox again. You’ll notice that the Skype extension is no more.
只需删除该文件夹(或为了安全起见将其移动到其他位置)，然后再次打开Firefox。 您会注意到Skype扩展不再可用。
翻译自: https://www.howtogeek.com/howto/internet/firefox/manually-remove-skype-extension-from-firefox/
火狐浏览器需要手动删除