- tried this chrome extension for several days, seems it helps :-) share here... https://chrome.google.com/webstore/detail/tab-limiter/pbpfchnddjilendkobiabenojlniemoh
other better solutions?
I more recently have tried Toby, which lets me organize my open tabs into groups based ("next gen infrastructure research", "VPNs", etc). It also syncs across computers. But, I've been having problems with being able to drag and drop tabs into it recently, so it's kind of stuck, and I may have to try something else.
On a personal side: I've learned to let go.
I can always find web pages in browser history. You can too, so never keep tabs open just so you can come back to them later.