In the enterprise world, Firefox lacked a few, small, but critical features:

1) MSI Installers

2) Group Policy Administrative Templates

3) Proxy configuration from Windows

4) Enterprise PKI integration

Some of these are supported now, but for about a decade there was at least one person in Mozilla with a philosophical opposition to doing anything that is seen as helping an enterprise Windows network deployment.

I'm pretty certain that Firefox still doesn't work properly in a large corporate environment. At any rate, I've given up trying, as have millions of other administrators. We installed Chrome, which "just worked", and moved on.

The result of this is that enterprise web applications were written for Chrome, not IE or Firefox. Chrome became mandated and automatically pushed to every machine. It has become the new IE6, for better or worse.

Firefox missed that boat.

Yep, you can count me in this group as well. The Firefox team goes out of it's way to make so many changes that just seem useless or annoying; it's baffling to me. It really feels like a team with too many devs and designers sitting around needing to create work. I very much doubt that's actually the case, but that just means it's a widespread management issue.

That said, it doesn't make me want to stop using Firefox because the only other option is Chrome which has bigger issues.

The navigation bar on the bottom is an interesting expiriment but still I quickly moved it back up.

The new tab layout is worse. Each tab need much more space so you can display about half the number of tabs on the same space.

The top sites when you opened a new tab also disappeared. It seems you can put bookmark or something to replace them but the top site feature was really good. I'm likely to want to visit sites I visit the most and that used to be a touch away