JS and CSS snippets for web

Name: JS and CSS snippets for web
Rating: 5 (1 reviews)
Author: Yupma

By: Yupma Add-on

Run peristent JavaScript and CSS code snippets on any website.

Overview

Firefox Add-ons Store

Daily users

Data as of 2026-09-01

Rating:

5.00

(1)

Version:

1.0.0

Last updated: 2026-01-16

Features & Capabilities

Snippet Injector lets you add your own code to websites based on URL rules. Create and manage snippets that run automatically when pages load. Perfect for developers, QA engineers, power users, and anyone who wants to customize websites or test scripts.

Key Features

Inject JavaScript or CSS: Run code in the page’s main world or isolated CSS safely.
Flexible URL rules: Apply snippets to all websites, a single domain, exact URLs, or custom regular expressions.
Enable or disable snippets: Turn snippets on or off without deleting them.
Persistent across reloads: Snippets automatically run when pages reload.
Dynamic page support: Works with modern single-page apps (SPAs) and iframe-based sites.
Built-in code editor: Write and edit snippets directly in the popup using a clean editor interface.

Who It’s For

Web developers testing or debugging code.
QA engineers automating workflows.
Power users customizing web apps or dashboards.
Anyone looking for a lightweight alternative to Tampermonkey.

Permissions & Privacy

Tabs: Check the active tab URL to run matching snippets.
Storage: Save your snippets and settings locally.
Scripting: Inject JavaScript and CSS into websites safely.
No data is collected, all code runs locally, and your snippets stay private.
Take control of your browser. Customize websites your way with Snippet Injector.

User Growth & Download Statistics

Add-on

By:

Yupma

Daily users:

Rating:

5.00

(1)

Version:

1.0.0 Last updated: 2026-01-16

Version code:

6120426

Creation date:

2026-01-13

Firefox add-on GUID:

{201d334e-fe76-49af-8ced-aec8468e769f}

Firefox add-on numeric ID:

2970513

Weekly download count:

Firefox on Android:

Yes

Risk:

Permissions:

Size:

1.03MB

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-09-01

Compare stats and ranking:

Ranking

# 17,031 ▼ 198

Other rankings

#51 in etsy keyword 35 ▼ 2#103 in javascript keyword 45 ▲ 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:

Yupma

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/js-and-css-snippets-for-web/

Is JS and CSS snippets for web 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.

JS and CSS snippets for web 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.
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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.

JS and CSS snippets for web 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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