I close my browsers with prejudice. If it mattered I would have put it into an issue or committed it to SCM before I wandered away from the tab. Also, history exists. If the reason we are keeping our tabs open is because we've disabled browsing history, then I have a simple suggestion to make.

Walking up to my workstation in the morning and seeing all the trash from yesterday's efforts causes me meaningful loss in motivation. I get down to a blank desktop at the end of each day now.