This plug-in is conceptually awesome, and offers many appealing features & options, especially around customisation and workflow adaptation / enhancement.

Unfortunately, in practice it fails to impress and deliver. It's far too slow and cannot handle the number of tabs I work with (which FF alone handles without issue), crashes often or causes browser to slow down, and the interface is poor and when using the customisation options, the results are often different to expectations. I've since found a plug-in related to this category that works swiftly and reliably without issue, although has far less features.