Small question here. I try to set CTRL+SHIFT+W to open an internet browser. Every time I add it to the keyboard shortcuts in the settings, it takes back a level in the settings menu rather than accepting my new shortcut. Any ideas?
Can not confirm what is using or has been assigned ctrl+shift+w to close tabs or windows but that is probably why the window closes when you try to assign that shortcut to launch browser.
After checking HUD and System Settings>All Settings>Keyboard there appears to be no thing assigned that keyboard shortcut. Refering to https://wiki.ubuntu.com/Keybindings gives information regarding using dconf Editor to view all keyboard shortcuts but again no thing is being shown that indicates ctrl+shift+w being assigned to any thing.
Searching the web confirms some body has filed a bug at launchpad so it might be worth our while to add as affected here.
Looking at this question may also indicate something has changed with regard how keyboard shortcuts work in newer flavours.
Depending on your keyboard you could assign the appropriate media key or hot key or Function Key to launch browser through All Settings>Keyboard>Launchers>Launch Web Browser which would give one button launch ability.
Maybe Unity shortcut may be an option?
Open your browser and right click the icon in launcher to lock it to launcher.
Press and hold the Super(Windows icon) which will show HUD with information regarding keyboard shortcuts.
Note looking at Launcher your browser icon may have been assigned a number.
If pressing and holding Super does not show a shortcut number for your browser
Just drag and drop the launcher icon to nearer the top of launcher for it to be assigned a number.
This is because Ctrl + Shift + W shortcut will close all currently open tabs (Ctrl + W will close only the current tab). If you are in a browser (Chromium, Firefox) this shortcut will entail closing the window.
Try to use another combination like Ctrl + Shift + B or Ctrl + Shift + C (these I tested) and will work like a charm.