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How do I get my HP smart print back? It was gone after the last update

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  • Last reply by bigbear321

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after getting requests to update my Foxfire. I did and my HP Smart Print was gone when the update was complete. it had been working before the update. I want it back or let know what replaces it.

after getting requests to update my Foxfire. I did and my HP Smart Print was gone when the update was complete. it had been working before the update. I want it back or let know what replaces it.

Chosen solution

Here is the "fix" to get it to work now, but HP is going to have to update that add-on properly so that it will work in Firefox 44 and after. This "fix" is temporary just for Firefox43.


There's an add-on - https://addons.mozilla.org/fr/firefox/addon/install-unsigned-add-ons/ - to "automate" this procedure.

https://support.mozilla.org/en-US/kb/add-on-signing-in-firefox#w_what-can-i-do-if-firefox-disables-an-installed-unsigned-add-on

Override add-on signing (advanced users): You can override this setting by changing the xpinstall.signatures.required preference to false in the Firefox Configuration Editor (about:config typed in the URL bar). Support is not available for any changes made with the Configuration Editor so please do this at your own risk.

Note: That pref will be gone in Firefox 44 (Release slated for Jan 26. 2016) so user's of currently un-signed extensions should contact the developers of those extensions and prod them into getting their act together & get their extensions signed by Mozilla. Otherwise the users of those extensions will be SOL come the release of Firefox 44. Mozilla has already pushed back the version in which this new security feature was to be enabled from Firefox 40 to 44. I doubt if there will be any further reprieve.

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Chosen Solution

Here is the "fix" to get it to work now, but HP is going to have to update that add-on properly so that it will work in Firefox 44 and after. This "fix" is temporary just for Firefox43.


There's an add-on - https://addons.mozilla.org/fr/firefox/addon/install-unsigned-add-ons/ - to "automate" this procedure.

https://support.mozilla.org/en-US/kb/add-on-signing-in-firefox#w_what-can-i-do-if-firefox-disables-an-installed-unsigned-add-on

Override add-on signing (advanced users): You can override this setting by changing the xpinstall.signatures.required preference to false in the Firefox Configuration Editor (about:config typed in the URL bar). Support is not available for any changes made with the Configuration Editor so please do this at your own risk.

Note: That pref will be gone in Firefox 44 (Release slated for Jan 26. 2016) so user's of currently un-signed extensions should contact the developers of those extensions and prod them into getting their act together & get their extensions signed by Mozilla. Otherwise the users of those extensions will be SOL come the release of Firefox 44. Mozilla has already pushed back the version in which this new security feature was to be enabled from Firefox 40 to 44. I doubt if there will be any further reprieve.

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the xpinstall.signatures.required is set to false but it still is saying that the HP Smart print is disabled after a restart of firefox