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Firefox (64-bit)

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Firefox 43.0.2 (64-bit)

  -  45.32 MB  -  Open Source
Free Download

Security Status

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of Firefox 43.0.2 (64-bit).


For those interested in downloading the most recent release of Firefox (64-bit) or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


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If you have any questions or ideas that you want to share with us - head over to our Contact page and let us know. We value your feedback!

Download Firefox 43.0.2 (64-bit)

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    Firefox 43.0.2 (64-bit) Screenshot 1
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What's new in this version:

Fixed:
- Cross-site reading attack through data and view-source URIs
- Privilege escalation vulnerabilities in WebExtension APIs
- Integer underflow and buffer overflow processing MP4 metadata in libstagefright
- Integer overflow in MP4 playback in 64-bit versions
- Underflow through code inspection
- Buffer overflows found through code inspection
- DOS due to malformed frames in HTTP/2
- Hash in data URI is incorrectly parsed
- Cross-origin information leak through web workers error events
- Integer overflow allocating extremely large textures
- Use-after-free in WebRTC when datachannel is used after being destroyed
- Firefox allows for control characters to be set in cookies
- Same-origin policy violation using perfomance.getEntries and history navigation
- Crash with JavaScript variable assignment with unboxed objects
- Miscellaneous memory safety hazards (rv:43.0 / rv:38.5)

Changed:
- Use a SHA-256 signing certificate for Windows builds, to meet new signing requirements

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