Today Mozilla released Firefox 40. We just just deployed it to all Browserling's OS platforms. You can already cross-browser test your websites and JS code in Firefox 40!
Try Firefox 40 in Browserling now!
The new Firefox 40 features include:
- Support for Windows 10.
- Added protection against unwanted software downloads.
- User can receive suggested tiles in the new tab page based on categories Firefox matches to browsing history (en-US only).
- Hello allows adding a link to conversations to provide context on what the conversation will be about.
- New style for add-on manager based on the in-content preferences style.
- Improved scrolling, graphics, and video playback performance with off main thread compositing (GNU/Linux only).
- Graphic blocklist mechanism improved: Firefox version ranges can be specified, limiting the number of devices blocked.
Firefox 40 biggest changes include:
- Add-on extensions that are not signed by Mozilla will display a warning.
- NPAPI Plug-in performance improved via asynchronous initialization.
- Smoother animation and scrolling with hardware vsync (Windows only).
- JPEG images use less memory when scaled and can be painted faster.
- Sub-resources can no longer request HTTP authentication, thus protecting users from inadvertently disclosing login data.
Firefox 40 HTML5 updates include:
- IndexedDB transactions are now non-durable by default.
- Implemented AudioBufferSourceNode.detune to modulate playback rate in cents, a logarithmic unit of measure used for musical intervals.
Firefox 40 developer tool updates include:
- Improved Performance tools in the developer tools: Waterfall view, Call Tree view and a Flame Chart view.
- New rules view tooltip in the Inspector to tweak CSS Filter values.
- Console API messages from SharedWorker and ServiceWorker are now displayed in web console.
- New page ruler highlighting tool that displays lightweight horizontal and vertical rules on a page.
- Inspector now searches across all content frames in a page.
Firefox 40 fixes include:
- Kannada text does not display properly in built-in pdf viewer.
- Various security fixes.
Firefox 40 security fixes include:
- Use-after-free in XMLHttpRequest with shared workers.
- Mozilla Content Security Policy allows for asterisk wildcards in violation of CSP specification.
- Vulnerabilities found through code inspection.
- Buffer overflows on Libvpx when decoding WebM video.
- Heap overflow in gdk-pixbuf when scaling bitmap images.
- Feed protocol with POST bypasses mixed content protections.
- Out-of-bounds write with Updater and malicious MAR file.
- Arbitrary file overwriting through Mozilla Maintenance Service with hard links.
- Overflow issues in libstagefright.
- Use-after-free in MediaStream playback.
- Out-of-bounds read with malformed MP3 file.
- Miscellaneous memory safety hazards (rv:40.0 / rv:38.2).
Happy cross-browser testing in Firefox 40!
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