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Signed extension shows up as "could not be verified for use in Firefox"

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I have an extension that has been signed by Mozilla that shows up as "could not be verified for use in Firefox. Proceed with caution" in the add-ons manager. I installed the extension by copying the file to ~/Library/Application Support/<vendor>/Extensions/{id}/@name.xpi on OSX and to %appdata%\Mozilla\Extensions\{id}\@name.xpi on Windows. Upon restart of Firefox 42 the extension gets installed and works fine, except for the worrying message. However, when I install the extension by dragging it onto the Firefox window it gets installed fine and does NOT show the worrying message.

Is this a bug in Firefox or am I installing my extension incorrectly and is the documentation at https://developer.mozilla.org/en-US/Add-ons/Installing_extensions incomplete?

I have an extension that has been signed by Mozilla that shows up as "could not be verified for use in Firefox. Proceed with caution" in the add-ons manager. I installed the extension by copying the file to ~/Library/Application Support/<vendor>/Extensions/{id}/@name.xpi on OSX and to %appdata%\Mozilla\Extensions\{id}\@name.xpi on Windows. Upon restart of Firefox 42 the extension gets installed and works fine, except for the worrying message. However, when I install the extension by dragging it onto the Firefox window it gets installed fine and does NOT show the worrying message. Is this a bug in Firefox or am I installing my extension incorrectly and is the documentation at https://developer.mozilla.org/en-US/Add-ons/Installing_extensions incomplete?

All Replies (4)

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You should have dragged that extension into the browser window or used File > Open File - if that menu item is available on MacOSX.

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I'm trying to install the extension programmatically using another application, so I can't drag the extension.

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You should ask about that over at the Add-ons fora. https://discourse.mozilla-community.org/c/add-ons

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Isisombululo Esikhethiwe