Sunrise is the open-source web browser based on WebKit. It has the new features for efficiently using. Freeware.
All in One Window
The main window of Sunrise has the browser, bookmarks, downloads, source codes and find bars. You do not need to look for the hidden panels because the one window has all of them.
You can do following things seamless:
Dropping the link into bookmarks for registering
Dropping the bookmark item to the tab for accessing
Comparing the sourcode of the web pages
Finding a word from a source code in the same tab
Finding a word from a web page in the same tab
The downloads items show as icon