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Firefox for Mac

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Download Firefox 33.0

Firefox 33.0

  -  64.21 MB  -  Freeware

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 33.0.


For those interested in downloading the most recent release of Firefox for Mac 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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  • Firefox 33.0 Screenshots

    The images below have been resized. Click on them to view the screenshots in full size.

What's new in this version:

- Windows: OMTC enabled by default
- OpenH264 support (sandboxed)
- Enhanced Tiles
- Continued experimentation with WebRTC-powered communications feature
- Improved search experience through the location bar
- Slimmer and faster JavaScript strings
- Search suggestions on the Firefox Start (about:home) and new tab (about:newtab) pages
- New CSP (Content Security Policy) backend
- Support for connecting to HTTP proxy over HTTPS
- Improved reliability of the session restoration
- Azerbaijani [az] locale added Changed:
- Proprietary window.crypto properties/functions removed
- JSD (JavaScript Debugger Service) removed in favor of the Debugger interface HTML5:
- DOMMatrix interface implemented
- @counter-style rule from CSS3 Counter Styles specification implemented
- WebCrypto: RSA-OAEP, PBKDF2 and AES-KW support
- WebCrypto: wrapKey and unwrapKey implemented
- WebCrypto: Import/export of JWK-formatted keys Developer:
- Cubic-bezier curves editor
- Display which elements have listeners attached
- New sidebar which displays a list of shortcuts to every @media rule in the current stylesheet
- Paint flashing for browser content repaints
- Editable @keyframes rules in the Rules section of the Inspector
- CSS transform highlighter in the style-inspector

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