Has there been any development for this request? I also recently switched from Firefox+Tree Style Tabs to Chrome+Sidewise on my Mac and I love it!!! The "Focus the sidebar on mouse hover" solves halve of the issue.

Would it be possible to add another option like when leaving the Sidewise-window (onmouseleave event or something like that) to switch back to the last opened window of Chrome (same as shortkey CMD + ~)? If a tab for another window would be clicked the focus can change to that window, but as soon as the cursor is being detected in de Sidewise-window again it should change focus back to the Sidewise window, so that when the cursor is leaving the window the shortkey CMD + ~ works for the right window.

Also I would like to add that the "Focus the sidebar on mouse hover" function should ónly be active when the Chrome program is active. Now when I'm using another program as soon as the cursor enters the Sidewise-window area it shift focus which means I'm not using the program I want to use anymore. This can be really annoying! I know most Windows-users maximise their windows, but on a Mac most users have multiple windows from different programs overlapping each other, so this becomes an issue.

Thanks very much for (hopefully) processing my input!