Head's up -- Mozilla has now released Firefox v29.0 -- the new update is ready via the browser's update system, and the offline installer ( for all languages ) will be ready at the main publisher's site soon
EDIT: Here is the known Release Notes in regards to the new Firefox v29.0 -- Firefox — Beta Notes — Mozilla
For those that are a bit confused with the new format, you can visit this Mozilla Support Inquiry to help you set it to a "classic theme": What happened to the Add-on Bar? | Firefox Help