ungoogled-software/ungoogled-chromium

Add a new flag that allows users to override system prefers-reduced-motion setting

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#3,786 opened on May 19, 2026

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enhancementhelp wanted

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Description

Description

Add a new flag that allows users to override system prefers-reduced-motion setting

Who's implementing?

  • I'm willing to implement this feature myself

The problem

If Animations are disabled in Windows settings or Reduce Motion is enabled in macOS settings, there is no way to keep animations in Chromium.

Possible solutions

Add a new flag that allows users to override system prefers-reduced-motion setting, like Firefox's "ui.prefersReducedMotion".

Alternatives

No response

Additional context

These command line flags exist: --force-prefers-reduced-motion --force-prefers-no-reduced-motion But they will not work when right click - open with ...

Contributor guide

Research direction
Study existing flags like force prefers reduced motion in the Chromium source, then implement a similar setting in the browser preferences UI, referencing Firefox's ui.prefersReducedMotion.
Tech stack
cpp
Domain
frontendtooling
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitC++ basicsChromium build environment
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
45