Firefox 4 Beta 1 was released by Mozilla. The official release will take place at the end of the year, 2010.
Firefox 4 will be a major upgrade from earlier versions, which will include:
- A redesign of the user interface
- Tabs are at the top -- except in the Mac version
- enhanced HTML5 support
- hardware-accelerated HD video
- WebSockets - low-complexity, low-latency, bi-directional communication system
- enhanced add-on support via Jetpack: a tool that allows developers to create add-ons without needing to have in-depth programming knowledge. Extensions are built using CSS, Javascript and HTML. When they are installed the user will not need to restart the browser.
- Jetpack Gallery - browse the inventions of others in the community - if you build it, they will browse it. :)