Here's one more extension in the Chrome store I saw and I think might help you organize too many tabs. It's called: One tab. Here's the link. https://chrome.google.com/webstore/detail/onetab/chphlpgkkbolifaimnlloiipkdnihall?hl=en-US
And here's an article about it. http://www.pcworld.com/article/2031951/reduce-tab-clutter-in-chrome-with-onetab.html