Userscripts engine is not working on stable version on Rolling Release systems (Garuda Linux)

[gleyconJ]

Hello, Otter Browser team.

I am opening this issue to report that the native userscripts feature appears to be non-functional on the stable version of the browser when running on a modern rolling-release operating system.

Problem Description

User scripts can be added normally through the Tools > Addons panel, and they persist in the list after restarting the browser. However, they produce absolutely no effect on webpages. The functionality seems to be completely disabled in practice, although the management interface works.

System Environment

• Operating System: Garuda Linux (Arch-based, rolling release, fully updated as of September 2025)
• Desktop Environment: KDE Plasma 6
• Otter Version: 1.0.03 (the latest stable version available in the official repositories)

Troubleshooting Steps Taken

Before opening this issue, I performed a series of tests to isolate the cause of the problem:

1. Tested with Multiple Scripts: I tried several scripts from different sources (Greasy Fork and custom-written scripts), including:
   • Global dark mode scripts (using both filter: invert and GM_addStyle).
   • Site-specific scripts (e.g., a dark theme for Wikipedia).
   • A minimal, custom-written test script that only changed the background and text color, to ensure there were no errors in the code.
2. Technically Corrected Scripts: Scripts that used less robust CSS injection methods (createElement('style')) were rewritten to use GM_addStyle, but they still failed to work.
3. File Management: I confirmed that the .user.js files are saved correctly in the ~/.config/otter/profiles/default/userscripts/ directory.

None of the tested scripts had any visual or functional effect.

Hypothesis

My suspicion is that an incompatibility exists between the stable version of Otter (from 2022) and the newer libraries of a rolling-release system like Garuda (Qt versions, etc., from 2025). It is likely that this incompatibility has silently broken the userscripts execution engine.

Could you please confirm if this is expected behavior or if there are any other debugging steps I could try?

Thank you for your excellent work on this browser!

[gleyconJ]

<style type="text/css"> p, li { white-space: pre-wrap; } hr { height: 1px; border-width: 0; } li.unchecked::marker { content: "\2610"; } li.checked::marker { content: "\2612"; } </style>

otter-browser-git

Browser recreating the best aspects of the classic Opera interface

URL	https://github.com/OtterBrowser/otter-browser
Versão	1.0.03.r3055.g337b3f27-1
Licenças	GPL-3.0-or-later
Disponibiliza	otter-browser=1.0.03
Depende De	qt5-multimedia qt5-svg qt5-webengine hicolor-icon-theme
Dependências Opcionais	hunspell : for spell checking [installed]
Conflita Com	otter-browser
Tamanho Instalado	12.07 MiB
Empacotador	Garuda Builder team@garudalinux.org
Arquitetura	x86_64
Data da Criação	Sunday, 28 de September de 2025 19:21:05 Horário Padrão de Brasília
Data da Instalação	Sunday, 28 de September de 2025 23:19:15 Horário Padrão de Brasília
Motivo da instalação	Explicitly installed

otter-browser-git Browser recreating the best aspects of the classic Opera interface

URL
https://github.com/OtterBrowser/otter-browser
Versão
1.0.03.r3055.g337b3f27-1
Licenças
GPL-3.0-or-later
Disponibiliza
otter-browser=1.0.03
Depende De
qt5-multimedia qt5-svg qt5-webengine hicolor-icon-theme
Dependências Opcionais
hunspell : for spell checking [installed]
Conflita Com
otter-browser
Tamanho Instalado
12.07 MiB
Empacotador
Garuda Builder team@garudalinux.org
Arquitetura
x86_64
Data da Criação
Sunday, 28 de September de 2025 19:21:05 Horário Padrão de Brasília
Data da Instalação
Sunday, 28 de September de 2025 23:19:15 Horário Padrão de Brasília
Motivo da instalação
Explicitly installed