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About the developer

187 Stars 10 Forks MIT License 45 Commits 9 Opened issues


Very Clean Firefox userChrome Mod

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No longer being maintained

Quietfox was fun to build, but with the new updates to Firefox's UI, much of its role of modernizing Firefox's interface is no longer needed. I would like to think I had some influence on some of Firefox's new design decisions, but either way I think they're doing good work. Thank you for enjoying Quietfox, best wishes to everyone.


The Goal

This userChrome mod was created to make the Firefox UI cleaner and more modern without sacrificing any of its original features. You can still use themes, and you can still use Compact Mode and Touch Mode. You can pretty much forget that you have a mod installed, it works quietly in the background. Here are some of the notable features:

Customizable values

Simply open userChrome.css in a text editor and change the values at the top of the file. Restart Firefox to see changes.

Toolbar Customizations

/* -------------------- 🎨 Customization 🎨 -------------------- */
    --tab-corner-rounding: 7px;
    /* --menu-corner-rounding: 10px; */
    /* --menu-item-height: 30px;     */
    --button-corner-rounding: 20px;
    --animation-speed: 0.4s;

/* -------------------- 🎨 Customization 🎨 -------------------- */
    --tab-corner-rounding: 0px;
    /* --menu-corner-rounding: 10px; */
    /* --menu-item-height: 30px;     */
    --button-corner-rounding: 0px;
    --animation-speed: 0.0s;

Menu Customizations

/* -------------------- 🎨 Customization 🎨 -------------------- */
    /* --tab-corner-rounding: 7px;     */
    --menu-corner-rounding: 10px;
    --menu-item-height: 30px;
    /* --button-corner-rounding: 20px; */
    /* --animation-speed: 0.4s;        */

/* -------------------- 🎨 Customization 🎨 -------------------- */
    /* --tab-corner-rounding: 7px;     */
    --menu-corner-rounding: 0px;
    --menu-item-height: 25px;
    /* --button-corner-rounding: 20px; */
    /* --animation-speed: 0.4s;        */

Theme-adapted menus

Address bar buttons appear when needed

How to install

  1. Download and unzip
  2. Go to
    in Firefox and open your Profile Folder
  3. Drop your unzipped "chrome" folder into the folder that appears
  4. Go to
    in your Firefox and set the value of
    (this enables the loading of userChrome mods)
  5. Restart Firefox

✔ Tested on Firefox 87 on Windows 10 and Ubuntu 19.10

Older version

If you need Quietfox for an older version of Firefox, see the releases page.

Note about transparent themes

Although deliberate effort has been put into making this mod work with most themes, some transparent themes make menu text hard to read. Transparent themes also make the bottom corners of rounded tabs look wonky, so the file includes instructions to remove tabs' bottom corner rounding if you encounter this issue.

P. S.

This mod is the product of many late nights of zen laser focus. If it enhances your web experience, consider donating a small sum to show your support ❤

Bitcoin: 1Lc5r26FTwWSLNH46fE5WH3mvFjNUcHGzi


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