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Minimalist, Simple, Keyboard Centered and heavily based on SimpleFox. 🦊

Cascade is a Firefox Theme based on SimpleFox. This theme was known previously as "ag.proton"—but let's be honest: That sounds hella boring. What you get is a really simple one-line layout that works well with the new Proton UI.

On larger window resolutions Cascade will have a oneline layout which displays the URL bar and tab list next to each other. Smaller resultions will stack both UI elements on top of each other for better readability.

If you're looking for a mouse-friendly clone please check out Waterfall by Clément!
A big »Thank you« to Nick, Abdallah and Benyamin for all the great suggestions for improvements! ♡

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Contents

• Installation
• Customisation
• Keyboard Shortcuts

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How to use a userChrome.css theme

1. Type about:config into your URL bar. Click on the I accept the risk button if you're shown a warning.
2. Seach for toolkit.legacyUserProfileCustomizations.stylesheets, layers.acceleration.force-enabled, gfx.webrender.all and svg.context-properties.content.enabled and set them to true.
3. Go to your profile folder:
   • Linux: $HOME/.mozilla/firefox/######.default-release/
   • MacOS: Users/[USERNAME]/Library/Application Support/Firefox/Profiles/######.default-release
   • Windows: C:\Users\[USERNAME]\AppData\Roaming\Mozilla\Firefox\Profiles\######.default-release
4. If it doesn't exist already create a folder called chrome.
5. Copy your desired userChrome.css into that folder.
6. optional Customise everything to your liking.

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Customise Cascade to your liking

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Breakpoint

Edit the min-width value to change the breakpoint size on which Cascade will switch to the oneline layout.

@media (min-width: 1000px) {
    
    [...]
    
}

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Colours

You can use your own colours for Cascade. To do so just edit the following block on top of the config section. By default it will use a dark theme but colour suggestions for light theme users are given as well. Please also change Firefox' theme in your settings to make sure you get the best compatibility.

If you're using a custom colour scheme (e.g. Firefox Color) you can comment out the entire block to use the default colours provided by the Theme Addon.

 :root {
    
    /* main window colour – toolbar & window background */
    --window-colour:    #1E2021;

    /* accent colour – active tab, button hover, ... */
    --secondary-colour: #191B1C;

    /* text and highlight colour */
    --inverted-colour:  #FAFAFC;

}

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Keyboard Shortcuts

This userstyle was made for a keyboard centered usage, like Tilling Window Manager users or just cool people that loves them! These are some of the shortcuts that are available:

Windows / Linux	MacOS	Description
Ctrl + L	Command * L	focuses the URL bar
Ctrl + B	Command + B	shows you the bookmark sidebar
Ctrl + Shift + B	Command + Shift + B	shows you the bookmark toolbar
Alt + Left Arrow	Command + Left Arrow	navigates backwards in your history
Alt + Right Arrow	Command + Right Arrow	navigates forwards in your history
Ctrl + T	Command + T	opens a new tab
Ctrl + Shift + T	Command + Shift + T	reopens the last closed tab
Ctrl + W	Command + W	closes the current tab
Ctrl + Page Up or Ctrl + Shift + Tab	Command + Option + Left Arrow	navigates to the previous tab
Ctrl + Page Down or Ctrl + Tab	Command + Option + Right Arrow	navigates to the next tab

For the full list of shortcuts visit the official Firefox website.‎ ‎ ‎ ‎ ‎