To be honest I find the use of a separate browser at work a good way of forcing separation - all "work stuff" is done in one browser, and all "personal stuff" is done in a different one.

This time around I'm using Chromium for personal stuff, and Firefox for work-stuff. I do more work-related browsing, so having the vertical tabs in firefox meant that was the better browser to use for official stuff.

(In my previous job I used safari for work, and firefox for personal.)