為了改善您的使用體驗,本網站正在進行維護,部分功能暫時無法使用。若本站的文件無法解決您的問題,想要向社群發問的話,請到 Twitter 上的 @FirefoxSupport 或 Reddit 上的 /r/firefox 發問,我們的社群成員將很快會回覆您的疑問。

搜尋 Mozilla 技術支援網站

防止技術支援詐騙。我們絕對不會要求您撥打電話或發送簡訊,或是提供個人資訊。請用「回報濫用」功能回報可疑的行為。

了解更多

Firefox won't redirect custom protocols to their programs

  • 2 回覆
  • 2 有這個問題
  • 1 次檢視
  • 最近回覆由 RashanH

more options

Every time I try to go to a custom protocol URL to get redirected to a program for things like website sign-in I get this error page instead of it working or offering the program selector. "The address wasn’t understood

Firefox doesn’t know how to open this address, because one of the following protocols (cag) isn’t associated with any program or is not allowed in this context.

   You might need to install other software to open this address."

The protocol shows up in the applications setting and is pointed to the correct program. I have made sure my Firefox and Windows 10 are fully up to date. I tried launching Firefox in safe mode. I actually completely reinstalled my computer. It works briefly until a little after sync completes but the computer it is syncing from does not have this issue.

This issue has occurred so far with Slack and Datto RMM.

Any help would be fantastic!

Every time I try to go to a custom protocol URL to get redirected to a program for things like website sign-in I get this error page instead of it working or offering the program selector. "The address wasn’t understood Firefox doesn’t know how to open this address, because one of the following protocols (cag) isn’t associated with any program or is not allowed in this context. You might need to install other software to open this address." The protocol shows up in the applications setting and is pointed to the correct program. I have made sure my Firefox and Windows 10 are fully up to date. I tried launching Firefox in safe mode. I actually completely reinstalled my computer. It works briefly until a little after sync completes but the computer it is syncing from does not have this issue. This issue has occurred so far with Slack and Datto RMM. Any help would be fantastic!

所有回覆 (2)

more options

Just a side note, this has been tested and works in Chrome and Internet Explorer

more options

Hello Dan,

Someone has posted about this kind of issue yesterday. Hope this will be fixed by FF developers.