Tuesday, May 13, 2025
HomeComputer SecurityFirefox 66.0.4 Released with the fixes for a Bug let NoScript and...

Firefox 66.0.4 Released with the fixes for a Bug let NoScript and HTTPS-Everywhere addons Disabled in TOR

Published on

SIEM as a Service

Follow Us on Google News

Firefox 66.0.4 released for both desktop and Android with the fixes for a recently discovered Firefox add-on bug let automatically disabled all the add-ons in the browser due to the expiration of the intermediary certificate.

In other words, we can say that Firefox forgot to handle certificate expiration for all add-ons, so all the legacy add-ons got disabled due not having a valid signature.

This impacts both Firefox and Tor, it also affects the important security add-ons NoScript and HTTPS-Everywhere which was disabled in Tor browser.

- Advertisement - Google News

NoScript is an important security add-on that’s officially trusted by Tor, as well as being installed by millions of other regular browser users.

HTTPS Everywhere is a Firefox, Chrome, and Opera extension that encrypts your communications with many major websites, making your browsing more secure also it is one of the legacy extensions in Tor.

Even if the users were tried to reinstall the add-ons, it always failed to download the new add-ons and throw the error “failed to download”.

Users have faced the same issues in Firefox when users try to download the add-on installation that will be prevented by saying  “the add-on downloaded from this site could not be installed because it appears to be corrupt”.

Since the Tor browser based on Firefox, all the addons should be signed with valid digital certification and the failed signature update caused this serious issue in both browsers.

you can disable this signature requirement by setting the xpinstall.signatures.required setting to false. valid signatures is a mandatory security feature, it should only be disabled until Tor releases a new version with a bundled fix.

about:config -> searchxpinstall.signatures.required, right-click on it, and select Toggle.

Firefox 66.0.4

This new release of Firefox 66.0.4 includes the fixes for the expired certificate and disabled add-ons.

Firefox team were continuously working for the past two days finally resolve the certificate chain to re-enable web extensions, themes, search engines, and language packs.

According to release note for Firefox 66.0.4 ” Repaired certificate chain to re-enable web extensions that had been disabled “

New version of Firefox 66.0.4 can be download here

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity updates also you can take the Best Cybersecurity courses online to keep your self-updated.

Balaji
Balaji
BALAJI is an Ex-Security Researcher (Threat Research Labs) at Comodo Cybersecurity. Editor-in-Chief & Co-Founder - Cyber Security News & GBHackers On Security.

Latest articles

Marks & Spencer Confirms Customer Data Breach in Recent Cyber Attack

British retail giant Marks & Spencer has officially confirmed that customer personal data was...

Zoom Workplace Apps Flaws Allow Hackers to Gain Elevated Access

Zoom has released multiple security bulletins addressing seven newly discovered vulnerabilities in Zoom Workplace...

PoC Exploit Published for macOS Sandbox Escape Vulnerability (CVE-2025-31258)

Security researchers have disclosed a new macOS sandbox escape vulnerability tracked as CVE-2025-31258, accompanied...

Four Hackers Caught Exploiting Old Routers as Proxy Servers

U.S. authorities unsealed charges against four foreign nationals accused of operating a global cybercrime...

Resilience at Scale

Why Application Security is Non-Negotiable

The resilience of your digital infrastructure directly impacts your ability to scale. And yet, application security remains a critical weak link for most organizations.

Application Security is no longer just a defensive play—it’s the cornerstone of cyber resilience and sustainable growth. In this webinar, Karthik Krishnamoorthy (CTO of Indusface) and Phani Deepak Akella (VP of Marketing – Indusface), will share how AI-powered application security can help organizations build resilience by

Discussion points


Protecting at internet scale using AI and behavioral-based DDoS & bot mitigation.
Autonomously discovering external assets and remediating vulnerabilities within 72 hours, enabling secure, confident scaling.
Ensuring 100% application availability through platforms architected for failure resilience.
Eliminating silos with real-time correlation between attack surface and active threats for rapid, accurate mitigation

More like this

Metasploit Update Adds Erlang/OTP SSH Exploit and OPNSense Scanner

The open-source penetration testing toolkit Metasploit has unveiled a major update, introducing four new...

Firefox’s Future Uncertain Without Google Search Deal, Insider Warns

Mozilla's Chief Financial Officer testified that Firefox could face extinction if Justice Department proposals...

Firefox 138 Launches with Patches for Several High-Severity Flaws

Mozilla has officially released Firefox 138, marking a significant update focused on user security....