v2.20 - Tested on Firefox v146.0

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v2.20 • 11/12/2025 • Tested on Firefox v146.0

• Fix New Tab customization menu for wallpaper selections for v146. Remove blur for secondary menu (first page still has it) as it's no longer properly working. Add transition and change design a bit (Recent).

preview animation

preview change

• Remove mobile phone button from new tab. Could be already hidden by Firefox but to be sure force hide the lingering code. (Commits on Nov 26, 2025).
• Fix tab background color in private browsing mode. Only for those who Firefox targeted with new config preference (browser.privatebrowsing.felt-privacy-v1) (Commits on Nov 24, 2025)
• Private page tab switch background flashing color fix. Only for those who Firefox targeted with new config preference (browser.privatebrowsing.felt-privacy-v1) (Commits on Nov 24, 2025)

Changes made only in userChrome.css and userContent.css files.

v2.19 - Tested on Firefox v143.0

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v2.19.4 • 07/11/2025 • Update fix

• v2.19.3 web apps buttons fix caused regression in normal vertical tabs mode. Both should be fixed now.

v2.19.3 • 09/10/2025 • Update fix

• Fix web apps window control buttons for default OS controls.

v2.19.2 • 25/09/2025 • Update fix

• Fix search mode switcher color and border radius [code].

v2.19.1 • 22/09/2025 • Update fix

• Fix searchbar in extra mods for firefox v143.0 (transparent and border mods),

v2.19 • 17/09/2025 • Tested on Firefox v143.0

• Fix web apps window control buttons for min-max-close_buttons.css mod [code].
• Fix searchbar for firefox v143.0 [code].

v2.18 - Tested on Firefox v141.0

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This is probably the last update before v3.0 unless firefox
breaks something again.

v2.18 - 23/07/2025 - Tested on Firefox v141.0

• Remove empty space after Pinned tabs again after v141.0 update (recent).
• Fix Windows thicker_control_buttons.css mod (still need to check on windows 10) (recent).
• Fix new tab page layout for Firefox v141.0 (recent).
  These configs were removed by firefox and not used anymore
  (browser.newtabpage.activity-stream.newtabLayouts.variant-a)
  (browser.newtabpage.activity-stream.newtabLayouts.variant-b)
• Fix MacOS min-max-close_buttons.css mod after v141.0 update (still need to check on windows 10) (recent).
• Removed outdated MicaForEveryone files as it wont be needed anymore. I may add quick transparency mod before v3.0 but not sure.
• Fix switch to tab button inside search dropdown (Jul 14, 2025).
• Fix white_github_icon_in_bookmarks.css, should show correct in bookmark folders #205 (Jun 4, 2025)
• Hide new tab shortcuts pin after new layout changes. Hover and hold over the title/text to see if the shortcut is pinned (May 28, 2025).
• cleaner_extensions_menu.css Style 2 from v3.0, fully reworked (May 27, 2025):
  Read configure-preferences.txt for configuration or you can see in readme here with previews.
  Supported configs:
  • mod.number.of.extensions.in.a.row
  • mod.extensions.menu.extention-icon.size
  • mod.hide.manage-extensions.button
  • mod.disable.extensions-menu.separator
  • mod.hide.faded-extensions.inside.extensions-menu

• Add support for new search engine mode switcher (May 27, 2025). If you want to use old search engine switcher disable in about:config "browser.urlbar.scotchBonnet.enableOverride".

• Added Issue and feature report template for github.

Known issue:
Wallpaper style themes mod.

v2.17 - Tested on Firefox v137.x

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v2.17 - 01/04/2025 - Tested on Firefox v137.x

• Fix all files to support firefox v137 code changes.

Firefox v140.x Download latest full

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v2.16.1 - Tested on Firefox v136.x

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v2.16.1 - 31/03/2025 - Tested on Firefox v136.x

• fix tabs speaker/audio icon color on hover (only userChrome file changes).

v2.16 - 31/03/2025 - Tested on Firefox v136.x

• Linux min/max/close buttons code rewrite to fix duplicated buttons in vertical tabs mode.
  New mod folder, added setup readme file for changing order and location of buttons through about:config. No more manual padding adjustment needed if only few/one button visible.
• Minor context menu (right click) changes for Linux.
• New tab shortcut button (plus sign) size fixed for new/test Firefox layout.
• Fix sidebar/verticalTabs background color when using Auto Firefox Theme. To use custom theme accent colors for sidebar/verticalTabs enable (mod.custom.firefox.theme.color.fix in about:config).
• Hide extension text inside url bar by default until clicked (#193).
  
  
  Added mod.hide.extension.url.icon about:config preference to hide the icon too if needed.
• Added an option for centered tabs. Enable mod.centered.tabs in about:config (#192).
• Make tab group work correctly (#190). Not fully adapted/tested as it's not fully implemented into stable version.

Updated files this release:

• UserChrome.css
• UserContent.css
• New mod folder "MacOs style buttons for LINUX"

Uploaded userChrome and userContent separately who don't want to download full folder.

v2.15.1 - Tested on Firefox v136.x

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Updated files this release:

• UserChrome.css
• UserContent.css
• Only popout_bookmarks_bar_on_hover.css file changed in Extra Mods folder.
• Assets folder

v2.15.1 - 05/03/2025 - Tested on Firefox v136.x

• Fix location permission causing empty space.
• Granting website location permission will be shown in urlbar without hover.
  
• Added about:config preference to hide location permission icon until the button is pressed.
  mod.hide.location.permissions.icon
  

v2.15 - 05/03/2025 - Tested on Firefox v136.x

• Firefox changed New Tab page for random users making things smaller. I implemented a check if preference is enabled to try get back old style as close as possible [code]. The preference (officially used by firefox devs) can be manually disabled in about:config with
  browser.newtabpage.activity-stream.newtabLayouts.variant-a or
  browser.newtabpage.activity-stream.newtabLayouts.variant-b
• In v136 firefox changed tab audio playing/mute button location on unpinned tabs. Adapted code to work with new location and with vertical tabs. If I find a way to make it back to the website favicon location I will reverse it back. (And yes the icon look weirdly centered by firefox itself, if they wont fix it soon I will try it myself).
  
• Fix colors for vertical tabs panel.
• Make vertical tabs more compact vertically compared to recent v136 changes.
• Firefox implemented tab close button on vertical tabs (weirdly not centered too, for me at least). I can hide it but I will leave it for now to see where firefox devs takes it.
  
• Added about:config preference to disable vertical tabs scrollbar when tabs overflowing.
  mod.disable.scrollbar.in.vertical.tabs
• Updated popout_bookmarks_bar_on_hover.css so when dragging bookmark or folder around inside a folder it wont hide it anymore.
• Bookmarks bar color will now be the same as other toolbars to work better with vertical tabs and sidebar panel. Border removed. Popout bookmarks bar mod will have old dark color, can use other mod files to change it.
• Context menu changes, more compact with new icon fixes. Not tested in Linux yet.
  
• Firefox v137 or v138 changed some naming preference selector in code so things could be broken if you use beta or nightly. Can be fixed but it would break current stable v136. Create an issue and I will tell you what to change to fix it.

v2.14 - Tested on Firefox v133.x

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Warning

Only download this for Firefox v133.0. Older versions will be broken. Update should be out on 26/11/2024

Important

For future updates, enable svg.context-properties.content.enabled in about:config for icon colors to work. Added notification at the top if you have it disabled. Notification will hide itself when you enable it.

Latest Changes

Recent: added updated popout_bookmarks_bar_on_hover.css

• It Fixes window control buttons being visible in fullscreen mode(like videos) when custom absolute positioned buttons used (mac os style) because of added z-index for v133.

v2.14 - 26/11/2024 - Tested on Firefox v133.0

• Removed menu open animation it was affecting extension menus. Will add it later after I find the way to fix the issue. #162

v2.13 - 26/11/2024 - Tested on Firefox v133.0

• Forgot to add notification to remind users to enable svg.context-properties.content.enabled. Most icon changes in v3.0 will require this. #161

v2.12 - 26/11/2024 - Tested on Firefox v133.0

• Fixes for Firefox v133 as it changed a lot of stuff:
  • Searchbox/urlbar fixes and changes.
  • Main menu padding changes, more compact.
  • More compact buttons.
  • Show tracking protection button in search.
    
• Added Menu panels open animation.
• Support for vertical tabs and new sidebar if you have access to it (maybe they enable in official v134 or v135).
• List of mods changed and fixed for v133:
  • all min-max-close_buttons.css files;
  • popout_bookmarks_bar_on_hover.css;
  • tabs_separator.css;
  • autohide_tab_and_bookmarks_bars.css;
  • tabs_take_full_bar_width.css.

v2.11 - Tested on Firefox v132.x

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Important

v3.0 with vertical tabs support, mica transparency, one-liner, modularity and big overhaul expected release with Firefox 133 or 134 version. Firefox has been changing a lot of stuff recently.

Latest Changes

v2.11 - 01/11/2024 - Tested on Firefox v132.0

• Added tab sound indicator edits from v3.0 as firefox v132 had some changes done to it. Pinned tabs have blur. Let me know if you want blur option on normal tabs. (recent)
  
  Let me know if you want option for icon to move to the center on pinned tabs (not pixel perfect on different scaling/resolution systems but doable).
  
• Added preference to fully disable tab preview panel: firefoxcss.disable.tab.preview.panel.fully Enable in about:config (type in search). Or if you want to use old style tab previews Disable this option browser.tabs.hoverPreview.enabled. (recent)
• Add blur effect when moving tabs around.
  
• Spill theme light support. Thanks to #157.
• Fixing issues with custom firefox themes that adds image or gradient #151 Still some changes I want to make in the future so my colors dont overwrite it but not a priority right now.
• Fixes to transparent popout bookmars bar. Now you can press on the elements that are behind transparent background #150.
• Removed old scrollbar code as it was affecting some website scrollbars and not the main window one #149.

Added nightly version that should work on Firefox v133 and v134 as it breaks search bar. Some stuff could be still broken until stable. Dont recommend using it.

v2.10 - Tested on Firefox v130.x

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Latest Changes

v2.10 - 13/09/2024 - Tested on Firefox v130.0

• Keep showing the min/max/close buttons when alt menu pressed and visible.
• Context and popup menus changes.
• Color fixes for native input/select elements that some websites use (#145).
• Fix Zoom Icon Misalignment using "cleaner_extensions_menu.css" in firefox menu (#148).
• Fix colors for context/select menu in add bookmark popup menu (#145).
• Change mozilla profile image in firefox menu to custom default when used with icons mod (#148).
• Update "Personalize new tab" menu in homepage/new tab.
• Adjust light firefox theme colors.
• Adjust homepage/new tab colors to work with wallpapers. Colors and blur automatically change when wallpaper is set. Different wallpapers have different color schemes: light or dark (firefox devs themselves decided which wallpaper has which color scheme). Light and Dark firefox window themes support.

Other Previews

v2.9 - Tested on Firefox v128.x

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Latest Changes

v2.9 - 22/07/2024 - Tested on Firefox v128.0

• Fix linux searchbar buttons not rotated correctly (v128.0 bug for some Linux distros).
  
  
• Some Pocket stuff changes by request #92.
• Fix positioning of remove_homepage_shortcut_title_text.css mod.
• Fix circular_homepage_shortcuts.css mod.
• Fix autohide_tab_and_bookmarks_bars.css mod.
• Fix url_bar_no_border.css mod #133.
• Fix search_bar_transparent_background.css mod #133.
• Added option for tabs on top by request #132.
  Enable in about:config by setting firefoxcss.tabs.on.top.enable to true.
  
  (tested windows only for now, on linux will need to set --firefoxcss-control-buttons-margin to 0px in userChrome file)

Work on version 3.0