Firefox 4.0 is planned to defend chrome

Almost with the same chrome visual effects firefox is also starting his new development child called as Firefox 4.0
Here are the highlights of the Firefox 4.0

# Merging the LocationBar and SearchBar
# Merging Stop/Refresh/Go Into One Button
# Adding a Tab-on-Top Option
# Introduction of App Tabs
# Expanded Home Tab Functionality
# Hiding Bookmarks Bar
# Profile Stuff
# Removal of Status Bar

Major UI Change in 4.0

Several major additions and changes are being discussed to the UI for 4.0. Keep in mind these changes are farther out and therefore more in flux than ideas for 3.7.

* Merging the LocationBar and SearchBar
* Merging Stop/Refresh/Go Into One Button
* Adding a Tab-on-Top Option
* Introduction of App Tabs
* Expanded Home Tab Functionality
* Hiding Bookmarks Bar
* Profile Stuff
* Removal of Status Bar

These directions are still in early brainstorming and proposal phase, and broader suggestions and ideation is welcome