• Lepton (old name: Proton Fix)
  • Introduction
  • Installation Guide
  • WHY Proton?
  • WHY Not Proton?
  • Padding Comparisons
  • F&A

Lepton (old name: Proton Fix)

Table of Contents

• Lepton (old name: Proton Fix)

  • Introduction
  • Installation Guide
  • WHY Proton?
  • WHY Not Proton?
  • Padding Comparisons
  • F&A

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 Firefox 89 and above!!

Wiki
Installation Guide	Screenshots	Compatibility Issues Solution	Tips

(Lepton's design ⬆️)

• Color

  • Windows system theme support

• Icons

  • Panel

• Padding Narrower

  • Tab
  • Panel
  • Menu
  • Density

• 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

  • Clipped:

    • Cleary Text: Adjusted clipped gradation

  • Sound:

    • Remove Second Label
    • Show Favicon: Always show favicon

  • Container Tab:

    • Highlight line position: Displayed under favicon.

• Activity Stream Design

  • Search Bar:

    • Focused Shadow: Same as the accent color

  • Icons:

    • Size: Fill it up

Installation Guide

1. Download files

   • Click the green "⬇️ Code"-button above
   • Select "📦 Download Zip"

2. Find your profile directory

   • Open about:support in a new tab
   • Find the Profile Folder entry and click the Open Folder button

3. 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

4. Restart Firefox

   • Click the Clear startup cache... at the top of about:support

If you prefer Photon, see Lepton's photon-style.

WHY Proton?

I think a lot has improved.

(Proton's design ⬆️)

• Neatly organized menu
• Icon beautiful enough to remind you of Edge
• Nice color scheme
• Satisfied Rounding
• Modal window & Scrollbar!!

WHY Not Proton?

However, there are also many flaws.

(Photon's design ⬆️)

• Is it a tab or a button?
• Where are the menu icons?
• Icons in ActivityStream are too small
• Padding gaps are wide
• ⚠️ Address bar 3-point menu, screenshot moves to toolbar (can't fix)

Padding Comparisons

• Photon (Quantum)
• Proton
• Lepton

F&A

• Black pixels around the selected tab bottom corners
  

Please follow Installation Guide.
Or about:config's svg.context-properties.content.enabled to true

• Some panel menu items doesn't show
  

Please follow Installation Guide.
Or icons directory copy.