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Is there a fix for Firefox version 56.02 which would allow me to recover the usage of all my extensions and add-ons, INCLUDING Reminderfox?

  • 4 replies
  • 1 has this problem
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  • Last reply by cor-el

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I kept Firefox version 56.02 (on both my Win 10 laptop & Win 7 desktop) so I could still use Reminderfox, one of the features which made me prefer Firefox to other browsers. With the current issues over Mozilla's blocking of extensions/add-ons, and the only fix I'm aware of involving upgrading to the latest Firefox version, it doesn't seem there is any way forward that would allow me to continue with Firefox + Reminderfox.

Chosen solution

Hello mcmlxiii,

Would you please take a look at this :

https://www.reddit.com/r/firefox/comments/bkspmk/addons_fix_for_5602_older/

Would that work for you  ?

It's not recommended, though - the best thing to do (for
many reasons) is to update to the latest Firefox version .....

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Chosen Solution

Hello mcmlxiii,

Would you please take a look at this :

https://www.reddit.com/r/firefox/comments/bkspmk/addons_fix_for_5602_older/

Would that work for you  ?

It's not recommended, though - the best thing to do (for
many reasons) is to update to the latest Firefox version .....

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Tried this, but couldn't get it to work. However, my granddaughter was able to show me how to do it correctly.

Many thanks.

Modified by mcmlxiii

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Hi mcmlxiii, it's crazy that an expired certificate could cause this problem, but that happened and this is where we are.

Regarding fixes, this is the status:

  • Firefox 66 - fixed in 66.0.5
  • Firefox 61-65 - use hotfix from this past weekend
  • Firefox 60 Extended Support Release - fixed in 60.6.3esr
  • Firefox 52-60 - hotfix expected shortly

All of these updates and hotfixes do the same thing: install a new certificate and then trigger a re-verification to mark the properly signed extensions as valid again.

The *unofficial* and *unsupported* workarounds can do the same thing in a different way, but they are more complicated to implement.

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There is a Legacy system extension coming for Firefox 52-60.

I don't know what about:config settings could prevent installing this extension.