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Firefox 31.0

  -  30.7 MB  -  Open Source
Free Download

Security Status

  • Latest Version

    Firefox 133.0.3 (32-bit)

  • Operating System

    Windows XP / XP64 / Vista / Vista64 / Windows 7 / Windows 7 64 / Windows 8 / Windows 8 64

  • User Rating

    Click to vote

  • Author / Product

    Mozilla Organization / External Link

  • Filename

    Firefox Setup 31.0.exe

  • MD5 Checksum

    1b270f41dd617b224f52d7b06298ef0e

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 31.0.


For those interested in downloading the most recent release of Firefox (32-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 31.0

  • Firefox 31.0 Screenshots

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    Firefox 31.0 Screenshot 1
  • Firefox 31.0 Screenshot 2
  • Firefox 31.0 Screenshot 3
  • Firefox 31.0 Screenshot 4
  • Firefox 31.0 Screenshot 5

What's new in this version:

New:
- Add the search field to the new tab page
- Support of Prefer:Safe http header for parental control
- mozilla::pkix as default certificate verifier
- Block malware from downloaded files
- Partial implementation of the OpenType MATH table (section 6.3.6) see documentation about mathematical fonts and the MathML Torture Test for details
- audio/video .ogg and .pdf files handled by Firefox if no application specified (Windows only)
- Upper Sorbian [hsb] locale added

Changed:
- Removal of the CAPS infrastructure for specifying site-specific permissions (via capability.policy.* preferences). Most notably, attempts to use this functionality to grant access to the clipboard will no longer work. The sole exception is the checkloaduri permission, which may still be used as before to allow sites to load file:// URIs.

HTML5:
- WebVTT implemented and enabled
- CSS3 variables implemented

Developer:
- Developer Tools: Add-on Debugger
- Developer Tools: Canvas Debugger
- New Array built-in: Array.prototype.fill()
- New Object built-in: Object.setPrototypeOf()
- CSP 1.1 nonce-source and hash-source enabled by default
- Developer Tools: Eyedropper tool added to the color picker
- Developer Tools: Editable Box Model
- Developer Tools: Code Editor improvements
- Developer Tools: Console stack traces
- Developer Tools: Copy as cURL
- Developer Tools: Styled console logs
- navigator.sendBeacon enabled by default
- Dialogs spawned from the onbeforeunload event no longer block access to the rest of the browser

Fixed:
- Search for partially selected link text from context menu

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