Userchrome Toggle

This extension allows you to toggle userchrome.css styles on-the-fly with buttons and hotkeys.

Userchrome Toggle - On-the-fly userchrome.css styling

Userchrome Toggle is a Firefox add-on that allows you to dynamically toggle userchrome.css styles using buttons, hotkeys, and drop-down menus. Customize the Firefox interface on-the-fly without the need to restart the browser.

Add-on stats

By: Joolee
Users: 1,172
-54
Rating: 5.00
(6)
Version: 1.2 (Last updated: 2022-02-21)
Creation date: 2021-12-06
Weekly download count: 201
Firefox on Android: No
Risk impact: Low risk impact
Risk likelihood:
Manifest version: 2
Permissions:
  • notifications
  • storage
Size: 18.97K
URLs: Website

Other platforms

Not available on Chrome
Not available on Android
Not available on Edge
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Add-on summary

The userchrome.css file lets you customize the Firefox interface deeply. While very powerfull, any changes will require a restart of the browser to take effect.

This extension adds a new button to your toolbar that allows you to toggle custom userchrome.css styling on-the fly. The magic happens by including special CSS selectors in your user styles. Manipulating those selectors allows you to enable/disable up to three of your modifications on-the-fly.

The addon accomplishes this by changing the browsers 'title prefix' attribute. Don't worry! By using invisible UTF-8 characters by default, you won't even notice a thing! Toggle a single style or select up to three styles to toggle in a drop-down menu. Hardcore keyboard users can even use customizable keyboard-shortcuts.

Permissions and Privacy: The "Allow notifications" permission is needed to display a browser notification when you toggle a style. You can disable these in the settings. As for privacy, this extension doesn't connect to the internet whatsoever. You can check the source code on the 'Support site' linked on this page.

User reviews

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Add-on safety

Risk impact

Userchrome Toggle requires very minimum permissions.

Risk likelihood

Userchrome Toggle has earned a fairly good reputation and likely can be trusted.

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