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

Cannot install Lastpass add-on

  • 5 回覆
  • 1 有這個問題
  • 1 次檢視
  • 最近回覆由 FredMcD

more options

Since upgrading to FF42 (now on FF43) I haven't been able to install FF - either from the add-on tab or from lastpass's site. I have done a FF clean install; I have done FF refresh. I can install on Chrome without issue, but firefox is my preferred browser. I have contacted Lastpass and they have tried to resolve the issue, but it installs for them without issue. I am on Windows 7.

The attached powerpoints show the error messages. If I try from the add-on page, I get "There was an error installing lastpass". If I use the link lastpass provided (https://addons.mozilla.org/en-US/firefox/addon/lastpass-password-manager/) I get "LastPass could not be installed because Firefox cannot modify the needed file).

Since upgrading to FF42 (now on FF43) I haven't been able to install FF - either from the add-on tab or from lastpass's site. I have done a FF clean install; I have done FF refresh. I can install on Chrome without issue, but firefox is my preferred browser. I have contacted Lastpass and they have tried to resolve the issue, but it installs for them without issue. I am on Windows 7. The attached powerpoints show the error messages. If I try from the add-on page, I get "There was an error installing lastpass". If I use the link lastpass provided (https://addons.mozilla.org/en-US/firefox/addon/lastpass-password-manager/) I get "LastPass could not be installed because Firefox cannot modify the needed file).

所有回覆 (5)

more options

This will disable add-on signature enforcement; Enter about:config into your Firefox address bar Click the I'll be careful button Find xpinstall.signatures.required in the list Right click the preference Select Toggle until the value is false https://support.mozilla.org/en-US/kb/add-on-signing-in-firefox

https://wiki.mozilla.org/Firefox/AddOns/Status/Updates#Exec_Summary “Currently targeting Signing with no pref to turn off in Firefox 47”

more options

Thanks Fred - have just tried this but same result - still cannot install and throws the same error messages.

more options

Contact their support site for more help, or a reason for the error.

more options

I did - and they routed me here. They have no idea what is causing it.

more options

I've called the big guys to help you. Good luck.