Since the Snowden revelations we know that basically everything on the internet is being monitored by the NSA and probably other security agencies. Many times i was thinking what i could do to improve my privacy and i guess tor over chromium is a small step in the right direction.
TOR  wasn't something new to me but i never felt to play with it. However now i had a good reason to look at it and make it as easy as possible to use. TOR isn't actual difficult to use - just install, start and setup up the proxy in your favorite browser.
However, i doesn't want it to use it all the time since quite often you have enter captchas in order to enter some sites (i know it's not tor's fault - shame on you google). Furthermore disabling the proxy every time when i wanted to surf without TOR wasn't something which i would call simple. So i created a special shortcut, which not just starts chromium with the tor proxy enabled, but also starts it in incognito mode and as another user.
First install and start tor:
emerge -av tor rc-update add tor default /etc/init.d/tor start
Next, set up a new user:
useradd -m anonymous
Set the password for the user: (i choose to use a extra password as this means bookmarks in my "tor-browser" are extra secured to others)
Now create a new shortcut (mine was done via KDE Systemsettings - Shortcuts and Gestures - Custom Shortcut):
kdesu -u anonymous chromium --incognito --proxy-server="socks://localhost:9050"
This starts chromium in incognito mode, as user "anonymous" with tor! Bookmarks are stored under the user anonymous and are only available if you start the "tor-browser" or login as user anonymous.