Dualless

Dualless is a poor man's dual monitor solution. It splits your browser windows into two by just 2 clicks. The ratio can be adjusted according to your needs.You may have a  browser window showing on the right that occupy 30% of your  screen. Then the rest of space leave to Google+. 

The extension simulates the environment of dual monitor. Utilize the space for 16:9 monitor

Features

 * Split current browser window into a pair. And resize their position and size according to the ratio specified by user. (3:7,4:6,5:5,6:4,7:3)

 * Merge splitted browser windows back to a single window , or make it occupy the full screen area.

 * MacOS X like windows management. When one of the splitted windows got focused, the other in pair will be shown together. They always occupy the whole screen.

 * Press middle key on split window button will duplicate the current page on other window. 

 * Bookmark management. Relaunch your favior site in a new tab and windows will be splitted in the recorded ratio.

The software is released under open source license of GPL 2.0

Changes
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Release 0.4
  * Added auto maximize mode
  * After splitted, if one of the window close, the remaining one will be maximized to occupy all the space
 * Added bookmark support

Release 0.3
 * Now works with maximized window!
 * Press middle key on split window button will duplicate the current page on other window.
 * Vertical split is supported.
 * Options page is added. User may enable/disable pairing mode(MacOS simulation)
 * Ubuntu with Unity works better now