YouTube Subtitle Styler

Name: YouTube Subtitle Styler
Rating: 5 (1 reviews)
Author: Sefohui

Force your preferred subtitle style on YouTube — font, size, color, background and more. Styles stay locked in even when YouTube resets your preferences.

Overview

Firefox Add-ons Store

Daily users

Data as of 2026-07-28

Rating:

5.00

(1)

Version:

1.3.0

Last updated: 2026-03-14

Features & Capabilities

YouTube Subtitle Styler lets you take full control over how subtitles look on YouTube. Set your preferred font, size, text color, background color and opacity, bold, italic, and text shadow — then save once and never worry about YouTube resetting your preferences again.

Styles are enforced using CSS injection with a MutationObserver that automatically reapplies your settings if YouTube tries to override them. All settings are stored locally and applied instantly on every YouTube page you visit.

No account required. No data collected. Open source.

GitHub: https://github.com/Sefohui/youtube-subtitle-styler

User Growth & Download Statistics

Add-on

By:

Sefohui

Daily users:

Rating:

5.00

(1)

Version:

1.3.0 Last updated: 2026-03-14

Version code:

6181740

Creation date:

2026-03-09

Risk:

Permissions:

Host permissions:

*://*.youtube.com/*

Content scripts matches:

*.youtube.com

Size:

23.54KB

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-28

Compare stats and ranking:

Ranking

# 50,851 ▼ 50

Other rankings

#231 in style keyword 39 ▼ 1

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Sefohui

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/youtube-subtitle-styler/

Is YouTube Subtitle Styler Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

YouTube Subtitle Styler requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
Critical ******* ****** ** *** ********* ******** ***********
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

YouTube Subtitle Styler is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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