Lepton (old name: Proton Fix)

Table of Contents

Lepton (old name: Proton Fix)

🔔🔔 Does the theme not work after installation?

You should copy user.js file before the theme works.

The option system depends on user configuration, and nothing applies without settings.
Also, real-time changes are difficult because of technical limitations and require a restart.

Some settings can be conflicted and should be explicitly set to false.

🔔🔔 Is your Firefox version v102 or lower?

You have to set userChrome.compatibility.accent_color to true additionally.

Introduction

Proton is Firefox’s new design, starting from Firefox 89.
Photon is the old design of Firefox which was used until version 88.

Proton’s overall feel is good, but there were a few things I didn’t like and wanted to improve.
That’s why this project was born, and Lepton to denote light theme layer.

Disclaimer: It works on Firefox 89 and above!!

Wiki
Installation Guide	Screenshots	Tutorial	Options	Compatibility Issues Solution	Tips	Show Off Your Config

(Lepton’s design ⬆️)

Feature List (Click)

Color
- Default light/dark theme contrast enhancement
- Colorful context menu
- More dark mode support
- Windows/Mac/Linux system theme support
- Windows 7 compatibility
Icons
- Panel
- Context Menu
- Global Menu
- Library’s open context
- Video Player
Padding Narrower
- Tab
- Panel
- Menu
- Density
- Others…
Tab Bar Layouts
- Tabs on Bottom
- One Liner
- Vertical Tab Support
Tab Design
- General:
  - Connect with toolbar (buttons like tabs)
- Selected:
  - Box Shadow: Highlight the selected tab
  - Bottom Rounding: Natural
- MultiSelected
  - Adjust Color: Easily recognizable
- Unselect:
  - Divide Line: React to hover like chrome
- Unloaded:
  - Dimmed: Looks like inactive
- Clipped:
  - Clearer Text: Adjusted clipped gradation
  - Closed Button: Visible on hover
- Sound:
  - Remove Second Label
  - Show Favicon: Always show favicon
  - PIP Icon
- Container Tab:
  - Highlight line position: Displayed under tab
Button Design
- New tab: Looks like tab
Activity Stream Design
- Search Bar:
  - Focused Shadow: Same as the accent color
  - Hand off to Awesomebar
- Icons:
  - Size: Fill (Changes dynamically to your size)
Error Page Design
- Illustrations: Restore error page illustrations
Video Player
- Background Style
- Size at fullscreen
Fullscreen
- Overlap mode
Others
- Animations
- Hidden & Auto Hide
- Activate calculator at address bar
- Mouse pointer for each context

Installation Guide

Installation script (experimental)

Linux/Mac users:

bash -c "$(curl -fsSL https://raw.githubusercontent.com/black7375/Firefox-UI-Fix/master/install.sh)"

Windows users: Run with powershell (Does not work at Win7?)

Powershell -c "Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iwr https://raw.githubusercontent.com/black7375/Firefox-UI-Fix/master/install.ps1 -useb | iex"

Manual Installation

You can see the installation guide with screenshots on the wiki.

Download files
- Click the green “:arrow_down: Code” button above
- Select “:package: Download ZIP”
Find your profile directory
- Open about:support in a new tab
- Find the Profile Directory(Linux) / Profile Folder(Windows) entry
- Click the Open Directory(Linux) / Open Folder(Windows) button
Copy downloaded files
- Extract the downloaded zip file
- Copy the user.js file to the previously opened profile directory
- Create a new directory inside your profile directory called chrome
- Copy the remaining files from the extracted zip-file into previously created the chrome directory
Restart Firefox
- Click the Clear startup cache… at the top of about:support