cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Take Project Nova for a spin in Nightly!

AshleyT
Employee
Employee

Hi there! I'm Ashley, Senior Staff Product Manager for Firefox. After months of updates on Project Nova, it's finally in Nightly, ready for you to see for yourself. We're modernizing Firefox from the ground up to ensure it remains a fast, secure, and highly customizable companion for today’s internet.

This is still early days, so you'll notice some rough edges — a few things may look unfinished or inconsistent for now. Keep your Nightly up to date to see the latest. 

As a reminder, the Project Nova updates include:

  • Simpler navigation and a redesigned Settings experience, now live in release
  • Refreshed tabs, icons, spacing, and browser surfaces
  • More ways to make it yours, with rich new themes, wallpapers, and personalization options that let Firefox match your style.

We're grateful for all the thoughtful feedback we got on our earlier Connect post, on social media, and through user research. Based on what we heard, we've made some changes:

  • We'll be experimenting with corner roundness settings for tabs to give you more options — coming soon in Firefox Labs.
  • We brought back Compact Mode so there’s more space for web content and tabs
  • We added more neutral standard theme options.

You can learn more in our blog post.

See it first in Nightly

Nightly is where this work takes shape in the open, and we wanted you to be among the first to see where it's headed. Since much of what’s changed so far focuses on the look of the interface, keep an eye out for how these layouts feel during your day-to-day browsing. We're aiming for a clean, intuitive experience —so please look out for anything that feels off, like icons, spacing, alignment, or how things hold up across themes, window sizes, different languages, screen readers, and keyboard navigation. If something catches your eye, we'd love to hear about it.

Download the latest version of Nightly to see what's new.

Something's not right? File a bug.

If you find visual or functional issues with the Nova style changes in Nightly, please follow these steps:

  1. Click this link to file a Bugzilla issue. We're asking everyone to file bugs this way, so we can easily keep track of all issues reported.
  2. In the bug, please add steps to reproduce the issue, and if possible screenshots or screencasts. Please don't add severity and priority to the bugs — our triaging teams will handle that.
  3. You can see all Nova testing bugs filed here.

Have overall feedback? Let us know here in Connect.

Drop a comment here to let us know your thoughts and suggestions. Thanks for being part of this.

131 REPLIES 131

I used to like the gradients when Firefox had those themes back in.. 2015 or so.

But it was a conscious choice by me to switch to it, not a default.

Arenlor
Making moves

I can't click on the scrollbar without moving away from the edge. I can't click on the tabs without moving away from the edge. This reduces accessibility. I know you're proud of it, but usability comes before aesthetics. Whoever from the top down approved of this should get fired for making the browser worse and failing to do proper consultation.

filips123
Making moves

Are there any plans to fix the excessive padding on window borders which causes unclickable elements?

Currently with the redesign, both on the normal and compact mode, because of these "floating" UI elements, things like window controls, tabs and scrollbars are not completely at the edge of the window. Because of this, when the window is maximized, you can't anymore just drag the mouse to the top right corner and click on window controls, to the right and drag the scrollbar, to the top and click on the tabs, to the top left and click on the pinned tabs or sidebar, etc. This is something that I think many users expect to work and also works fine on basically every other app, so I think it should be fixed, both on the compact and also on the normal mode (and the touch mode I guess).

This is also a problem when the window is not necessarily maximized but just tiled to the edge of the screen. For example, on Windows, if I drag the window for example to the right, it automatically tiles/snaps to the screen borders (and another window on the left if it exists). In this case, the borders should also be removed to make clicking on elements near edge possible.

Also, could the floating elements mode be decoupled from the density setting? For example, I would prefer the normal UI density, but without the floating elements. However, regardless of how it looks visually, I think the above problem should be fixed.

Other than that, I think it looks fine. One visual suggestion/complaint that I have is that the bar with the address bar and extension widgets always has a darker fixed-color, while the tabs bar has almost complete transparency. The cut between them looks too harsh, especially on more colorful themes with background images, like Alpenglow (and probably other themes with vivid background images). I'm not sure what the solution would be, but it would probably look better if both the tabs and the address bar had around the same transparency level and color.

For example, here, the cut from the Alpenglow background of the tabs bar to the solid background of the address bar is quite harsh, and the background again leaks below the bar through the gaps between elements. Similarly, even on the Default/Dark theme, there is quite abrupt transition to the address bar.

filips123_0-1785175731722.png

filips123_1-1785175842139.png

Although it looks previously looked similarily, I think it's now more noticable because of the gaps between elements. Also, in the old design, the background of the tabs bar was more visible and more saturated, so it matched the address bar color more nicely.

filips123_2-1785176303498.png

filips123_3-1785176316896.png

 

Matth78
Making moves

Why a border between bookmarks toolbar and the above url bar ??? Doesn't look nice, it was better on older theme without this border.

About the tabs bar, it would be nice to disable the gradient. It doesn't look professional, I can already hear my IT department who are usually advocating for chrome 😕

I also think the squared tabs were a lot better and used space more efficiently

bjherbison
Making moves

Please read up on Fitts's law. I use web pages with buttons on the edges of web pages -- they no longer work because the button doesn't go to the edge. When I go to the edge and try to select text it doesn't work because you added the useless border. I move to the right to grab the scroll bar and nothing happens because the scroll bar doesn't go to the edge any more.

The useless border is making many web pages much harder to use, including anything with a scroll bar.

bozo64_
Making moves

Please, please just stick with the old UI, or at least keep an easy to find setting to pick between the two options. Thank you.

Sef
Making moves

How can I revert to the old UI?

about:config browser.nova.enabled Set it to false.

That works now, but probably won't work in the long term.

killsalot
Making moves

wow this is so bad I don't even know where to begin. First off what is with these support forums that pretend like you don't need an account to post? 

So regarding nova, first off, not being able to opt out is nuclear awful. Secondly, why did the coloscheme of the theme change? shapes of the icons? whatever. But why change the color? And why make it so hard to make it look like it used to? the theme customization in firefox is anything but accessible. And that would explain why the link in the blogpost doesn't actually tell anyone how to cusomize nova, its just a generic support page. 

Worst part by far is the VPN first browsing. Literally, not interested, and I do not trust you people to implement a browser based VPN that is actually secure. We live in a world where CORS exists because you people cannot even properly parse .json files, and you expect yourselves to make a VPN core to the browser and expect russians and iranian hackers to not be snooping packs through it? GET REAL. 

Seriously if you guys don't want feedback, if you're just gonna be a bull in a china shop, why do this goofy BS feedback forum? Just so you can sell my gmail to a 3rd party vendor? thanks for abusing me, I'll be sure to NEVER donate to mozilla again. 

killsalot
Making moves

Actually I take it back, worst part by a country mile is the border around the window.... with light theme on there is this huge border that literally was not there before. makes youtube and any dark website look really bad and the extra margin anyways is a very strange formatting choice.

Seriously I have websites built multi-colored that will look wrong in firefox with this theme setup the way you have. Im staring at an old copy of nightly right now on my dev mac and I can promise you this border did not exist until minutes ago when nova was shoved down my throat. Best part, it looks bad on your guy's own site too!!!!

yes, this is really ugly, i have no idea why Mozilla did that!

Yeah, I'll definetly get used to the roundness, even if I'm not a big fan. The border however definitely needs to go.

drunkenmunky_
Making moves

If you blindly move the mouse in the corner it has to catch the "close" button. As well windowed or minimize if you move the mouse on the upper most line.

Otherwise I like how mozilla tries out new things.

RiseofSeren
Making moves

Absolutely awful! Not only does it look ugly it completely breaks functionality of the browser!!!

- Scrolling is broken, you can't move your mouse all the way to the right to drag scrollbar anymore

- Clicking the X to close tabs is much harder since the hit-box is smaller

- Harder to read tab titles

Also, as other people have already mentioned, this also makes closing the browser infuriating.

If you don't revert this you will have a lot of people leave...

FeItan
Making moves

I don't like the round tabs but the customizable themes are super cool!

Rexon1221
Making moves

我是中国人,我前天下载了chrome因为它可以和codex联动,对比了下你的UI设计比Chrome好看,没有chrome臃肿,还是用了firefox,可是今天更新了UI设计,我觉得非常难用 而且很丑,不要为了设计而设计,以前我的鼠标指针移到右上角可以直接退出,现在不行了 为什么要设计成这样,为了不让人们退出浏览器吗,还是说你们内置了AI需要人们来训练?  而且为什么不能给我们一个选项自行选择旧版设计还是新版? ,不要为了设计而设计! 不要为了设计而设计! 不要为了设计而设计!  I'm Chinese. Downloaded Chrome the other day purely for its Codex integration—but honestly? Firefox used to feel like a breath of fresh air. Sleek, lightweight, no Chrome bloat. So I stuck with it. Then today’s UI update hit… and wow, what a mess. It’s clunky, it’s an eyesore, and it screams “design for design’s sake!” Remember when hovering the mouse to the top-right corner meant instant exit? Gone. Poof. What’s the logic here—force us to stay trapped in the browser? Or is there some sneaky AI in there that needs our eyeball time to train itself? And why—WHY—can’t we have a toggle between the old and new UI? Stop designing just to redesign! Stop designing just to redesign! STOP DESIGNING JUST TO REDESIGN!

Rexon1221_0-1785191885120.gif

 

Rexon1221_0-1785193024700.png

that will be helpful.

hexd0t
Making moves

The color strip of Containers has become very small, as if part of the favicon instead of the tab. This makes identification unnecessarily harder, especially because the new default themes all also have a gradient with worse contrast.

Also, running a Tiling Window Manager, I suddenly have an additional, non-functional and alien window decoration around Firefox windows.

Overall, I feel the current nova design misses an important point:

As a user, my focus is on the website, the browser is the tool to get there. The old UI presented the information needed, but got out of the way as much as possible.

With Nova, it feels like the Browser Chrome is trying to pull attention to itself, distracting from - and much more likely to clash with - the webpage being rendered.

I agree to this, the new design is a bit attention seeking

/thread

cephirosx
Making moves

The gradient color is a bit distracting, there should be an option for the new themes for the users if they want to use the gradient color or non-gradient.

Also on the default theme, the grayness of the toolbar is a bit on the bright side, there should be an option to make it darker or when the device system theme is dark it should also be darker

and I Still don't like the rounded corners, looking forward to the roundness settings

I just also want to add it here, I think most users choose their browser for the ease of use and speed

I like the current Firefox UI because it is not distracting and has it's own identity but with the new design it is like screaming "LOOK AT ME"

Hoping the team really listens to the various feedback about the design

eldmannen
Making moves

This looks terrible. It looks all foreign and alien to me. It sticks out like a sore thumb. It looks too bold and brazen. want it to look more anonymous and more like an ordinary system app so that I can focus on the web content instead of how fancy and cool the web browser looks.

ashw
Making moves

I like the new colour schemes and the thicker icons, and I don't mind the fact that most things are now rounder, but there seems to be a issue with the drop down menus (from the menu bar) and the items in the "hamburger" application menu. The edges of the items at the top and bottom are too close to the curved corners of the menu.

sgdsfhesrdssad
Making moves

Awful. Border with unclickable elements is really just stupid, makes using the scrollbar or closing the window needlessly complicated. Aesthetically it's very corny. What is with the obsession with gradients, lighting effects, and corners so rounded everything is an oval? It's all just distracting and obnoxious. I use a web browser to you know browse websites and not to admire whatever random design elements some mozilla dev thinks looks pretty. If I wanted to use a web browser designed for idiots I would use chrome. Please revert and never develop further 👍

bmcdev
Making moves

The edges are awful. And not just like a "oh this is new and I hate it" thing. Like I genuinely don't get why there is now margins at the borders. 

KERR
Familiar face

I was hoping the theming updates would be an improvement but looks like a long way to go. Rant warning!

KERR_0-1785209821529.png

KERR_1-1785209942182.pngKERR_2-1785210044430.pngKERR_3-1785210114831.png

KERR_4-1785210212309.png

The devtool accents should match the theme too!

KERR_5-1785210555236.png

Edge vs Firefox theme comparison. Sorry, but firefox has a long way to go 🙏

juuuustaminutes
Making moves

I dislike the padding. I always flick my mouse to the corners to close or open the first tab. Having to move my mouse down is **bleep**ty.

MadMac1
Making moves

I want the UI to take less space and provide less distractions. Not more. 

MammothJerk
Making moves

hit the update and immediately looked for a way to turn of the rounded corners on everything 🤢

who thought this was a good idea

As you aptly put it "rough edges" is an understatement, hopefully the team can can figure it out.

bnnck
Making moves

It looks great on light theme mode, but lost most it's nova identity when it's in dark theme mode

agreed

nos1609
Making moves

Using vertical tabs makes videos in fullscreen cropped with blank space from side- tabbar

nos1609_0-1785226666255.png

 

nos1609
Making moves

And vertical tabbar is opening with 1FPS or so, like the ui is being software rendered when there are lots of tabs opened even though I use my FF with 500+ tabs on average with no issues on the not nova UI

Pfize183
Familiar face

Fullscreen rendering is offset when Nova is enabled

When browser.nova.enabled is set to true, fullscreen mode is rendered incorrectly on my system.

The browser content is shifted, leaving a black border on the left and bottom edges of the screen. As a result, the webpage does not fully fill the display.

When I set browser.nova.enabled back to false, fullscreen works correctly again and the black borders disappear.

This issue is reproducible every time on my system.

Firefox version: 155.0a1 (2026-07-27 Nightly)
Operating System: Windows 11

NinjaTaco911
Making moves

Pls let dark theme be dark without the gradient.. 
And we need to be able to interact with the tabs and buttons without moving our cursor down like many in here are complaining about.
The borders around almost everything are really not needed and removes me from having an good ui experience

PRG
Making moves

Got the new Nightly update, and very quickly noticed there is an inconvenient deadzone area above the tabs where you can't click on them, preventing me from quickly moving the mouse to the top edge of the screen and clicking the tabs like I had been doing before the update. It seems to have been caused by a black outline across the whole browser window.

So because of muscle memory, I fling the mouse to the top edge of my screen and attempt to click on the tab, nothing happens, and now I have to mouse the mouse down to aim at the tab below the dead space. It is not convenient.

Switching to compact mode removes the outline, but there is still a pixel-tall deadzone above the tabs.

Please fix. For both compact and standard. There should be no deadzone between the edge of the screen and the tabs.

Likewise goes for the side-edge where the top left tab would be, and I assume there would be a similar deadzone for column tabs.

sysKin
Making moves

But why??

I help older people with their computers in a local community and their biggest fear is that something changes for no apparent reason. If this new theme eventually lands, I *will* get calls from multiple frightened seniors that they clicked something and it broke their computer and can I fix this please. No, they will not accept an explanation that some unknown UX developers were bored and changed things on their computer and I can't change them back.

Your "you've been updated" tab every few weeks is already giving them a scheduled heart attack (a.k.a. "my internet had no buttons but I closed my computer and opened it again and it works now").

I don't think you guys appreciate the magnitude of this problem. I'd appreciate some responsibility from Mozilla on this. Unless you have a REALLY good reason why this change is necessary and final and you will never have to do this again - just don't. At least minimise visual impact, this flip-flopping between rounded and sharp corners is becoming a meme in computing history.