The first impression is that it's far faster than the older Firefox 3.0.x, which is the current public release version. It's clear to see a big difference if you use 3.5 for a few hours and then revert back to the current 3.0.11 release. There are also big improvements to the support for the latest web technologies, including HTML5, new CSS properties and much more. There's a private browsing mode which means that the sites you visit will not be recorded or stored on your drive, keeping your privacy safe.
Be aware that some themes, add-ons and extensions may not yet work with the latest Firefox 3.5 RC1 and some may need to be updated manually using a test version of the add-on from the developer's website.
Download Firefox 3.5 RC1 link.
The skeleton was unearthed more than 20 years ago in South Africa
Moon's dark side is mountainous, rugged and never visible from the Earth
The groundwater basins in some areas of Tehran have been damaged irreversibly
This is the first time that any spacecraft on Mars has recorded air vibrations on the planet