Windows 10 bereikte EO (einde ondersteuning) op 14 oktober 2025. Als je Windows 10 gebruikt, lees dan dit artikel.

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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How does one get Firefox to install 1 Password extension?

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insidethebeltway
insidethebeltway

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?

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finitarry
finitarry

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

cor-el
cor-el
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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.