Easy to use, and also integrates with other extensions Assegnate 5 su 5 stelle
I'm the current developer and maintainer of the Mozilla Archive Format extension, and tried out Multiple Tab Handler while working on the tab selection window embedded in MAF.
As soon as I installed this extension, I found that it was very handy and really easy to use.
Using Ctrl+Click and Shift+Click on tabs did what I expected these key combinations to do. The extension also had some interesting features like selection-by-drag and close-by-drag.
Since I don't routinely use all the available functions, I was able to hide them from the context menu of the selected tabs, using the preferences window.
For developers, MTH provides a programming interface that makes it really easy to add new functions that work on multiple tabs; I used this interface in MAF, to provide an easy way to save multiple pages in a single file.