FlagTab is a very small extension for Mozilla Firefox (it only occupies 7 Kb) that allows the user to organize the browser's tabs, classifying them in four colors, so that it will be easier to work with numerous open tabs at once.
To change choose the color there are two ways to do it: with double click to go from one color to another or by clicking on the right mouse button, where the context menu opens: there we can choose the color.
The extension is very basic because it only performs one function, but it will be very useful for all those users who usually work with many open tabs.
You can free download FlagTab 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.