Firefox 41+ extension signing

In the never-ending quest for browser security, Firefox has started implementing safeguards to only allow signed extensions. I found this out after upgrading to Firefox 41 as my installed version of “Deque FireEyes” stopped working. Thankfully, there is a workaround in Firefox 41, but it goes away in Firefox 42.

  • Firefox 40: warning only!
  • Firefox 41: workaround, via:

    about:config:
    xpinstall.signatures.required = false
  • Firefox 42: BLOCKED! unless signed

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