Important Notice: We're experiencing email notification issues. If you've posted a question in the community forums recently, please check your profile manually for responses while we're working to fix this.

On Monday the 3rd of March, around 5pm UTC (9am PT) users may experience a brief period of downtime while one of our underlying services is under maintenance.

搜索 | 用户支持

防范以用户支持为名的诈骗。我们绝对不会要求您拨打电话或发送短信,及提供任何个人信息。请使用“举报滥用”选项报告涉及违规的行为。

详细了解

I have Firefox 4.0. I downloaded Video Downloader extension. Cannot open it, get message that there is no app in which to open it. Please advise. Ralph

  • 1 个回答
  • 7 人有此问题
  • 11 次查看
  • 最后回复者为 cor-el

more options

I cannot open Video Downloader, get message there is no app in which to open it, although I have Firefox 4.0.

I cannot open Video Downloader, get message there is no app in which to open it, although I have Firefox 4.0.

所有回复 (1)

more options

If you saved the .xpi file to your computer then use File > Open File to install the extension.

If is easier to install the extension directly from the website and not download the file.