Alternative to Firefox's Tab Groups feature for Chromium/Chrome

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http://askubuntu.com – Firefox keeps crashing the whole time on my Lubuntu 12.04 since version 12, I don't know why, I am running it on a Pentium IV desktop so might be CPU shortage, however I use the same set of extensions and configurations that I have on Windows' Firefox and it rarely crashes, runs smoothly and besides on Windows it can handle much more tabs opened before some freeze actually happens. Chromium is working better so far on Lubuntu, but I really do miss the Tab Groups Firefox feature, which is great to group tabs and organize them, it really is a boost on my productivity. Are you aware of any add-o (HowTos)