Second Sidebar for Firefox

A Firefox userChrome.js script for adding a second sidebar with web panels like in Vivaldi/Edge/Floorp/Zen but better.

Motivation

I've tried various browsers, such as Vivaldi, Edge, Floorp, and Zen, and they all have one thing in common that I can't imagine using a browser without — the sidebar. Unfortunately, Firefox, which I feel most closely aligns with my needs in terms of spirit and functionality, has a rather unsatisfactory sidebar. Therefore, I decided to create another one myself, with blackjack and hookers!

Demo

fss_demo_v1.4.mp4

Features

Sidebar

• Actions: Show • Hide
• Customize via Customize Toolbar...
• Settings: Position (left / right) • Auto-hide • Animate hiding / showing • Width • Floating web panel offset • Position of the new web panel button (Before plus button / After plus button) • Container indicator position (Left / Right / Top / Bottom / Around) • Hide sidebar in popup windows • Auto hide back button • Auto hide forward button

Web panels

• Actions: Create • Delete • Edit • Change width • Unload • Mute • Unmute • Pin • Unpin • Change zoom • Go back • Go forward • Reload • Go home
• Extensions support
• Sound icon
• Notification badge
• Periodic reload
• Settings: Web address • Multi-Account Container • Favicon web address • Type of web panel (pinned / floating) • Mobile View • Loading into memory at startup • Unloading from memory after closing • Hide toolbar • Hide sound icon • Hide notification badge • Periodic reload • Zoom

Widgets

• Second Sidebar to show / hide sidebar

Install (fx-autoconfig)

1. Install fx-autoconfig.
2. Copy the contents of the src/ directory (second_sidebar/ and second_sidebar.uc.mjs) into chrome/JS/.
3. Clear startup-cache.
4. Have fun!

If you use another loader

Use a wrapper script provided by @dimdamin: #5.