What happened?

Signature checking in Mozilla Firefox broke. Because Pluckeye on Android is based on Firefox, this also affected Pluckeye on Android.

I'm sorry about the inconveniences. :-( Ugh.

How to fix it?


  1. Open up Pluckeye.
  2. Type about:config in the location bar.
  3. Type xpinstall.signatures.required in the search box next to the magnifying glass.
  4. Toggle the value from "true" to "false".

IMPORTANT: If you clear your app data, the above steps will not work! In that case, you must instead install the latest Pluckeye for Android.


If you have Chrome or Pale Moon, use them. If you only have Firefox and Pluckeye is nowhere to be seen, try one of the following solutions.

  • Go back in time

    Because the failure is ultimately tied to certificate expiration, if you set the clock back, you can convince Firefox to honor add-ons once again.

    1. Set the date and time back to 2019-05-02.
    2. Restart Firefox.
    3. Re-enable Pluckeye on about:addons.
    4. Download and install Pale Moon.
    5. Set your clock back to normal time and use Pale Moon until Mozilla releases a complete fix.

      You can set your clock by clicking on the date and time in the lower right corner of your screen. See https://www.dummies.com/computers/operating-systems/windows-10/how-to-change-the-date-or-time-on-the-windows-10-desktop/

  • Command line

    If you are comfortable at the command line and you can afford to wait for your delay, drop down to level 1 and then use Firefox to install another browser.

    pluck set "delay 0"

    Then, after your delay elapses:

    pluck set "level 1"


    pluck unbork

    If you have registered on https://u.pluckeye.net/ , you may be able to get your delay expedited. But note that you need to have registered before reading this for the site to be of any help.

    After Pluckeye drops to level 1, install another browser. The following should work:

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