Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

How does one get Firefox to install 1 Password extension?

  • 2 replies
  • 1 has this problem
  • 14 views
  • Last reply by cor-el

insidethebeltway
insidethebeltway
more options

When I download the installer, a pop-up says it cannot install because "Firefox cannot modify the needed file". What is the needed file and how can I change the file so that it will install on Firefox?

When I download the installer, a pop-up says it cannot install because "Firefox cannot modify the needed file". What is the needed file and how can I change the file so that it will install on Firefox?

All Replies (2)

finitarry
finitarry
more options

This page has links to user guides. Maybe one of those will help. https://agilebits.com/support

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

This will happen if you install an Add-on that needs to be unpacked in order to function properly. Normally Firefox installs the XPI file and modifies its name, but if an extension needs to modify a file in its file structure or otherwise only works when unpacked (e.g. a dictionary) then you can get this error if the add-on doesn't get unpacked. Extensions that need to be unpacked should have an unpack instruction in its install.rdf file: <em:unpack>true</em:unpack>

You can temporarily toggle the extensions.alwaysUnpack pref to true on the about:config page to see if that helps to install the extension.