We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

What is the last version of Firefox that can run unsigned add-on?

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

awdrifter
awdrifter
more options

I downloaded the latest offline installer version of Firefox and it will not run a vital unsigned add-on. I have an older version of Firefox (42.0) that will run it. Is that the last version of Firefox without the add-on signature check? Thanks.

I downloaded the latest offline installer version of Firefox and it will not run a vital unsigned add-on. I have an older version of Firefox (42.0) that will run it. Is that the last version of Firefox without the add-on signature check? Thanks.

Chosen solution

Firefox 42 is the most recent version of Firefox that has been released to the public. If you are running a later build, it is probably either nightly, beta or Dev edition. If you have an unsigned add-on you need to run in those editions, you can disable the requirement by setting xpinstall.signatures.required to false in about:config.

Read this answer in context 👍 0

All Replies (2)

user633449
user633449
more options

Chosen Solution

Firefox 42 is the most recent version of Firefox that has been released to the public. If you are running a later build, it is probably either nightly, beta or Dev edition. If you have an unsigned add-on you need to run in those editions, you can disable the requirement by setting xpinstall.signatures.required to false in about:config.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

See also: