Mozilla has pushed back the release of Firefox 4 until 2011 as the company looks to resolve compatibility issues raised by the beta tests.
Work is being done to ensure that the next version of Firefox provides better speed and responsiveness for web applications, explained Firefox director Mike Beltzner.
"Completing this work is taking longer than initial estimates indicated as we track down regressions and sources of instability. As part of our commitment to beta users, we will not ship software before it is ready," he said.
"The frequent beta releases have been extremely helpful in identifying compatibility issues with existing web content, so we plan on continuing to release beta milestones through the end of December."
Beltzner estimated that the release candidate builds will ship in early 2011, with a final release date to follow "close behind". However, he also noted that the schedule is subject to change based on feedback from the community.
Firefox 4 has integrated support for HTML5, hardware accelerated HD video, multi-touch and additional security features.
The company has also been hard at work patching critical zero-day vulnerabilities being used by cyber criminals to install Trojans.
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