Re: Docking browser tabs to windows manager.

[Jonathan Dowland]

The Chromium (and Chrome) browsers have (or had) a feature called 
"application link" which does something similar to what you are asking 
for. You browse to a site/page/app that you wish to make into an 
"application", and then ask the browser to create an "application link".  

In the background this creates a .desktop file which instructs a new 
instance of chrome to be launched, that is isolated in some fashion from 
your normal one. As it's a .desktop file, it shows up in your desktop 
environment's list of applications, has an icon, etc. The browser that 
starts when you launch it is treated as separate in GNOME's alt-tab 
window (for example) for selecting applications, and the browser URL bar 
and buttons typically do not get drawn for that instance.

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Jonathan Dowland