After Firefox Mobile, killing Thunderbird and a sharp decline in market share, Mozilla finally starts to build what it's users want. Selling it as gigantic success is very American.

In the end vertical tabs are nice and I hope I like the new tab groups too (the previous official tab group addon got killed by Mozilla and 'destroyed' my workflows at the time).

Let's see, maybe Mozilla is on the path to something great yet again by being more innovative.