We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Ad Block Plus will not install. "Firefox could not install the file." What can I do?

  • 1 பதிலளி
  • 18 இந்த பிரச்னைகள் உள்ளது
  • 1 view
  • Last reply by TonyE

Error message is Firefox could not install the file at

https://addons.mozilla.org/firefox/downloads/latest/1865/addon-1865-latest.xpi?src=addondetail

because: Unexpected installation error Review the Error Console log for more details. -203

Error message is Firefox could not install the file at https://addons.mozilla.org/firefox/downloads/latest/1865/addon-1865-latest.xpi?src=addondetail because: Unexpected installation error Review the Error Console log for more details. -203

All Replies (1)