Svelte Devtools

Name: Svelte Devtools
Rating: 4.4545 (11 reviews)
Author: RedHatter271

By: RedHatter271

Browser devtools extension for debugging Svelte applications.

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Features & Capabilities

Svelte Devtools is a powerful Firefox extension designed to enhance your debugging experience with Svelte applications. It integrates seamlessly into Firefox Developer Tools, adding a dedicated tab that displays a hierarchical tree of Svelte components, HTMLx blocks, and DOM elements rendered on the page.

Select any node in the tree to inspect and modify its current state in a user-friendly panel. This extension streamlines the process of tracking state changes and understanding component structures, making it an essential tool for developers working with the Svelte JavaScript framework.

User Growth & Download Statistics

Add-on Developer Tools Programming

By:

Daily users:

Rating:

Version:

1.3.0 Last updated: 2021-01-02

Version code:

5158024

Creation date:

2019-05-25

Risk:

Permissions:

tabs
<all_urls>

Size:

62.64KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-15

Compare stats and ranking:

Ranking

# 2,751 ▼ 6

Other rankings

#309 in Web Development ▲ 1

#37 in component keyword 19

#73 in debug keyword 36 ▼ 1

#115 in tools keyword 67 ▼ 1

#120 in application keyword 37 ▼ 1

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Other platforms

Svelte DevTools (v2.2.2)

10,000 3.03

(30)

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:

RedHatter271

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/svelte-devtools/

Website:

https://github.com/RedHatter/svelte-devtools/issues

User Reviews

Svelte Devtools is highly valued for enhancing the developer experience by making variable and state inspection easy. Users praise its usefulness and contribution to the community. The main issue reported by multiple users is an error occurring during hot module replacement (HMR), which requires disabling the add-on temporarily. Overall, it is regarded as a fantastic and valuable tool for Svelte developers.

Pros

Works as expected and provides essential functionality.
Significantly improves developer experience with Svelte.
Makes it easy to view variables and state.
Highly appreciated by the community for its contribution.
Simplifies development and debugging process.

Cons

Incompatibility with Hot Module Replacement (HMR) causes errors requiring disabling the plugin.
No con specifically mentioned more than once.

Recent reviews

by *****, 2025-06-14

by Ar*****, 2024-10-03

by Sy*****, 2023-11-24

View all user reviews ›

Is Svelte Devtools 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.

Svelte Devtools 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 ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
Medium ****** ** ********* ****** ********* *** **** ****** **** **** ** ******* ** ********** **** ***********

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.

Svelte Devtools has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

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