Firefox Developer Edition. Get the Firefox browser built just for developers. Check out the home for web developer resources. Firefox Reality. Explore the web with the Firefox browser for virtual reality. Donate your voice so the future of. This article provides information about the changes in Firefox 75 that will affect developers. Firefox 75 was released on April 7, 2020. See also the accompanying hacks post — Firefox 75: Ambitions for April. Changes for web developers.

All versions

Mozilla Firefox is an open source web browser with a modern tabbed interface. It comes with a variety of security settings to protect you while online. It automatically blocks 2000 online trackers from collecting information about what you do online. Firefox comes with its own format of addons; thousands of third-party plug-ins are available, which can add more features to this browser. You also get built-in developer tools to edit and debug your websites.

Security Vulnerabilities fixed in Firefox 75

• Firefox 75

#CVE-2020-6821: Uninitialized memory could be read when using the WebGL copyTexSubImage method

Reporter

Jeff Gilbert, Kenneth Russell

Impact

high

Description

When reading from areas partially or fully outside the source resource with WebGL's copyTexSubImage method, the specification requires the returned values be zero. Previously, this memory was uninitialized, leading to potentially sensitive data disclosure.

References

#CVE-2020-6822: Out of bounds write in GMPDecodeData when processing large images

Reporter

Deian Stefan

Impact

moderate

Description

On 32-bit builds, an out of bounds write could have occurred when processing an image larger than 4 GB in GMPDecodeData. It is possible that with enough effort this could have been exploited to run arbitrary code.

References

#CVE-2020-6823: Malicious Extension could obtain auth codes from OAuth login flows

Reporter

Leon Visscher

Impact

moderate

Description

A malicious extension could have called browser.identity.launchWebAuthFlow, controlling the redirect_uri, and through the Promise returned, obtain the Auth code and gain access to the user's account at the service provider.

References

#CVE-2020-6824: Generated passwords may be identical on the same site between separate private browsing sessions

Reporter

Matthew Noorenberghe

Impact

moderate

Description

Initially, a user opens a Private Browsing Window and generates a password for a site, then closes the Private Browsing Window but leaves Firefox open. Subsequently, if the user had opened a new Private Browsing Window, revisited the same site, and generated a new password - the generated passwords would have been identical, rather than independent.

References

#CVE-2020-6825: Memory safety bugs fixed in Firefox 75 and Firefox ESR 68.7

Reporter

Mozilla developers

Impact

high

Firefox 75 Download

Description

Firefox 75 Address Bar

Mozilla developers and community members Tyson Smith and Christian Holler reported memory safety bugs present in Firefox 74 and Firefox ESR 68.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.

References

#CVE-2020-6826: Memory safety bugs fixed in Firefox 75

Reporter

Mozilla developers

Impact

high

Description

Mozilla developers Tyson Smith, Bob Clary, and Alexandru Michis reported memory safety bugs present in Firefox 74. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.

References