How to open Zotfile PDF annotation hyperlinks (zotero://open-pdf/0) from external apps?

I would appreciate help:
As showed in this screen-recording (, I pasted in Freeplane software a PDF annotation hyperlink extracted using Zotfile (zotero://open-pdf/0_K2GKN9F9/519).

If I click in the link from inside Zotero/Firefox, it will launch the PDF reader and load to the very exact position of the PDF highlighting.

By clicking in hyperlink pasted in Freeplane (zotero://open-pdf/0_K2GKN9F9/519), I was expecting that Firefox would be opened and the link loaded in the address bar. However, there is an error message "application not found".

Is it possible to open Zotfile hyperlinks (zotero://open-pdf/0) from external apps? In that case I am using Freeplane, but I also tried to click in the link from Word and the error is the same.

Thank you,
  • You need to register the zotero:// handler for your OS. This is done automatically for Zotero Standalone, but needs to be done manually with Zotero for Firefox:
  • Thanks for directions bwiernik.

    I had Zotero Standalone already installed. So I had to change just one register entering:


    "C:\Program Files (x86)\Zotero Standalone\zotero.exe" -url "%1"

    "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -url "%1"

    After that, any PDF annotation hyperlink clicked in any external application is being opened in Firefox/correspondent PDF reader in the exact position. Marvelously handy!
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