Firefox 43 has now officially disabled the fiddler hook addon citing it's unsigned in FF addons.
Could not be verified and has been disabled.
If someone can have a look at that I'd be immensely appreciative. because I love fiddler and use it a lot with FF :)
2 Answers, 1 is accepted
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Hello, David--
The Mozilla team has declined to sign the Fiddler addon, and the entire addon model upon which the addon was written is being removed from future versions of Firefox in the coming year.
Fortunately, the Firefox addon isn't necessary to use Fiddler with Firefox; have a look at http://www.telerik.com/blogs/configuring-firefox-for-fiddler for details.
Thanks,
Eric Lawrence
Telerik
The Mozilla team has declined to sign the Fiddler addon, and the entire addon model upon which the addon was written is being removed from future versions of Firefox in the coming year.
Fortunately, the Firefox addon isn't necessary to use Fiddler with Firefox; have a look at http://www.telerik.com/blogs/configuring-firefox-for-fiddler for details.
Thanks,
Eric Lawrence
Telerik
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David
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answered on 15 Dec 2015, 11:10 PM
Type about:config in the browser's address bar and hit enter. This loads Firefox's main configuration page.
Confirm the warning prompt if it appears.
Search for the preference xpinstall.signatures.required.
Double-click on it to toggle its value.
When you set it to false, you disable the add-on signing requirement.
Works for me. Google is your friend :)
See how we go in the future thanks for the prompt response and the info