1.8.5

Click Me ⬇️ 1.8.5 latest

⬇️ Please follow the installation instructions on main page.

🗨️ Submit an issue or ask questions not answered in the Wiki.

⚙️ Change settings, tab size, no borders, spacing, autohiding, more.

🎨 Learn how to create a Color Scheme like Catppuccin or Gruvbox.

⭐ FF Ultima Catppuccin-Mocha Edition by Draff (@ItsLogic) (promo)

Change Log:

• new Turn off ultima.tabs.vertical for the Tabs on Top layout.
• new Change between Color Schemes and New Tab Backgrounds by typing user.theme in the about:config page.
• new Toggle vertical tabs to the right side of the Browser with ultima.tabs.vertical.rightside. #29 #111
• qol When in Fullscreen mode (F11) rounded borders and spacing will be disabled. #115
• qol When in Fullscreen mode (F11) vertical tabs / sidebar become fully hidden, still accessible.
• qol When in Fullscreen mode (F11) hidden tabs / sidebar are fully responsive to hovering absolute screen corners and edges.
• qol Increased responsiveness to hovering vertical tabs area and mini-button-bar area.
• qol Improvement++ to full screen navigation-bar responsiveness.
• qol YT theming, notifications menu saturation decreased. #119
• qol Code Miniaturization.
• qol Setting browser.newtabpage.activity-stream.newtabWallpapers.v2.enabled will enable Firefoxs New-Tab Wallpapers feature. Overriding FF Ultima wallpapers.

Due to the nature of this theme being primarily vertical-tab focused, the tabs on top layout - may have some quirks. Though it behaves just as default-firefox behavior, please let me know if you spot anything that seems off.

FF Ultima is reaching it's maturity, additional updates to the theme will most likely only focus on bugs, patches, and fine-tuning. If you'd like to see more features added to the list, feel free to fork or push via pull request. Contributors, like always - are always welcome. Otherwise, enjoy.

Tabs on Top

Tabs on the Right

Color Scheme Editions