[swozey]

I absolutely hate the FF UI. I WANT to use FF, I actually switched a few months ago and did it for a couple of months. I THINK my problem (I say think because I feel like someone will measure the pixel and say I'm wrong) is that it feels like there is a ton of wasted space between the tabs, above the tabs. etc. I can't control the size of the top bars and they're huge compared to chrome. I'm a fan of tiny icons and very, very compact UIs so that I can get more on the screen at once. Here's my comparison on a 28" monitor https://www.dropbox.com/s/k32gln7s3ev5a7t/Screenshot%202016-...

[cpeterso]

You might try the "Custom Tab Width" add-on to shrink your Firefox tabs. I also like to set my toolbar bookmarks' names to an empty string, so my toolbar is just a bunch of bookmark favicons.

https://addons.mozilla.org/en-US/firefox/addon/custom-tab-wi...

[JupiterMoon]

Hang on the chrome UI at the top takes up a couple of mm more vertically than the FF one. What other differences are there?

[noir_lord]

For me it's the other way around, I use FF for everything but dev sessions where I use Chrome (I prefer it's dev tools).

I tried breaking the habit for a while but I ended up opening FF all the time by muscle memory.

[Tiksi]

Plugins can get you a very compact ui: http://paste.click/XfPZOR

I'm also a fan of minimal as possible.

[sawwit]

Perhaps give Tree Style Tabs on FF a try.