Click Me ⬇️ 1.7.7 latest

⬇️ Please follow the installation instructions on main page.

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

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

Jon (Community Manager @mozilla) discusses a potential future for Firefox that may interest you. Topics: Native Vertical Tabs, Tab Grouping, Profile Management, and more.

Change Log:

• Close-tab button for individual tabs causing shift with pinned tabs, fixed. (#43).

• Patch++ for 126.0 update (default-release), and 127.0b1. (#48).

  • Selector -moz- filtered out previously, fixed.
  • ultima.OS.kde, ultima.OS.gnome, ultima.OS.mac, ultima.OS.linux: title-bar button corrections, fixed.

DE	Preview
Windows
KDE
Gnome
Mac

• Userchrome-toggler extension support, for expanding/collapsing the tabs via shortcuts. Click here for more info.

• Sidebery configuration for those that want to opt out of the native vertical tabs (simply import into your sidebery settings), turn off ultima.tabs.vertical in about:config, works with autohiding the sidebar

Click Me ⬇️ 1.7.6 latest

⬇️ Please follow the installation instructions on main page.

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

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

Change Log:

• Quick patch+ for 126.0 update (default-release), and 127.0b1. (#48).

  • Selector -moz- has been further updated throughout the theme.
  • Linux Titlebar buttons (- o x) have been corrected for recent Firefox update. Inactive state, fixed. Positioning, fixed.
  • I'm not completely satisfied with the results, however there is now a new styling option. You can repaste the user.js or create a new pref (recommended) in about:config called ultima.OS.linux true to try it out.
  • ultima.OS.kde, ultima.OS.gnome, ultima.OS.mac, ultima.OS.linux

• Userchrome-toggler extension support, for expanding/collapsing the tabs via shortcuts. Click here for more info.

• Sidebery configuration for those that want to opt out of the native vertical tabs (simply import into your sidebery settings), turn off ultima.tabs.vertical in about:config, works with autohiding the sidebar

Click Me ⬇️ 1.7.5 latest

⬇️ Please follow the installation instructions on main page.

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

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

Change Log:

• Quick patch for 126.0 update (default-release), and 127.0b1. (#48).

• Userchrome-toggler extension support, for expanding/collapsing the tabs via shortcuts. Click here for more info. (#31)

• Sidebery configuration for those that want to opt out of the native vertical tabs (simply import into your sidebery settings), turn off ultima.tabs.vertical in about:config, works with autohiding the sidebar

Click Me ⬇️ 1.7.4 latest

⬇️ Please follow the installation instructions on main page.

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

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

Change Log:

• Licensing. Nothing changes for You, the User, but those unaware should know that they are free to modify, redistribute this theme; With the exception of licensing from other sources such as the New Tab Page which was created and approved by Hachiko or the Private Mode Indicator which originates from MrOtherGuy. Refer to their own licensing before proceeding (#39).

• Close button for tabs has been restored. I believe middle-clicking is still the superior (faster) option, but here it is. Note: Update your user preferences; ultima.xstyle.closetabsbutton to true. I recommend adding the preference manually or you can repaste the user.js file. Refer to the Modification page close tab button section for info/preview (#21 #24).

• Pinned tabs now have a tiny border to distinguish (visually) from selected tabs. Please offer feedback on how they look, they can/may be changed again.

• ⛑️ (WIP) prefaces for userchrometoggle extension (#31)

• Sidebery configuration for those that want to opt out of the native vertical tabs (simply import into your sidebery settings), turn off ultima.tabs.vertical in about:config, works with autohiding the sidebar:

Click Me ⬇️ 1.7.3 latest

⬇️ Please follow the installation instructions on main page.

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

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

Change Log:

• Returning Users, please use the new installation method (easy to follow)

• Linux Users can select a DE (KDE/Gnome) by searching for ultima.OS in about:config. Default is set to KDE.

• Mac Users title bar button positioning patch.

• (FF 126.0b6 patch - for developer editions, etc.) Some selectors for when the window are lwthemed are have been changed, fixed.

• Pinned tabs now have a tiny border to distinguish (visual) from selected tabs. Please offer feedback on how they look, they can/may be changed again.

• Tab dragging 🚧 default behavior of tabs shifting to the right has been patched.

• about:config preference for switching tabs via scrolling toolkit.tabbox.switchByScrolling, enabled in new user.js

• linux title bar buttons are now localized, to get past the default (and inconsistent) inactive window behavior.

• wip: spreadsheet for all variables in the documentation folder

• No margins, No borders, no rounded corners ultima.xstyle.squared option in about:config

• Next update will tackle optional styles for the 'close button' next to individual tabs.

Click Me ⬇️ 1.7.2 latest

⬇️ Please follow the installation instructions on main page.

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

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

Change Log:

• Returning Users, please use the new installation method (easy to follow)
• Linux Users can select a DE (KDE/Gnome) by searching for ultima.OS in about:config. Default is set to KDE.
• Tab dragging 🚧 default behavior of tabs shifting to the right has been patched.
• about:config preference for switching tabs via scrolling toolkit.tabbox.switchByScrolling, enabled in new user.js
• linux title bar buttons are now localized, to get past the default (and inconsistent) inactive window behavior.
• wip: spreadsheet for all variables in the documentation folder
• New, no margins, no borders, no rounded corners ultima.xstyle.squared option (about:config)
• New, enable/disable autohide for the sidebar when vertical tabs are disabled. (about:config)

◄ CLICK TO DOWNLOAD

Please follow the installation instructions on main page.

Changing tab sizes and autohide on/off? Creating Color Schemes? Something else? Come over to the modification page...

Change Log:

• ❗ Returning Users, please use the new installation method (easy to follow)

• ❗ Linux Users: Titlebar buttons corrections. They now adapt to dark/light modes and theme support, inactive window bug fixed. Select your DE (KDE/Gnome) by searching for ultima.OS in the about:config page. Default is already set to KDE.
  

• ❗ New/Easier format for changing settings. No longer have to go into the userChrome file

• Tabs Panel Appearance overhaul @Kaedriz

• Container tabs indicators (two optional styles) @Kaedriz

• Customize toolbar page improved visual appearance for button bar

• Styling for youtube and reddit disabled

• Git: Workflow structured, for users who fork/pull

• Default setting adjustments

  • tabs default to L (250px) with autohide on
  • the S option (140px) has been increased to (165px)

• Beautiful-newtab-Firefox. Thank you @hachikoharuno

• wip: spreadsheet for variables in the global-theme, and global-positioning files

• No margins, No borders, no rounded corners ultima.xstyle.squared option:

◄ CLICK TO DOWNLOAD

Please follow the installation instructions on main page.

Changing tab sizes and autohide on/off? Creating Color Schemes? Something else? Come over to the modification page...

Change Log:

• ❗ Returning Users, please use the new installation method (easy to follow)

• ❗ New/Easier format for changing settings. No longer have to go into the userChrome file

• Navigation bar spacing, centering of the url bar AND buttons

• ❗ Tabs Panel Appearance overhaul @Kaedriz

• Container tabs indicators (two optional styles) @Kaedriz

• Customize toolbar page improved visual appearance for button bar

• Styling for youtube and reddit disabled

• ❗ Linux Users, can now select their DE for titlebutton compatibility in the about:config page, search for ultima

• Linux: Titlebar buttons recieve improved positioning & padding, Window color overridden to match the theme

• Git: Workflow structured, for users who fork/pull

• Default setting adjustments

  • tabs default to L (250px)
  • the S option (140px) has been increased to (165px)
  • autohide on by default

• Beautiful-newtab-Firefox. Thank you @hachikoharuno

• wip: spreadsheet for variables in the global-theme, and global-positioning files

◄ CLICK TO DOWNLOAD

Please follow the installation instructions on main page.

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Please follow installation instructions on main page.

Default Settings: Tabs Size S and Autohide-Tabs off. Change both settings with one word in userChrome.

Help turning on Autohide? Switch default tabs size? Want to create your own Color Scheme? Something else? Come over to the modification page...