Auto-Clear Site Data

Name: Auto-Clear Site Data
Rating: 3.6429 (14 reviews)
Author: byuserforuser

Finally!!! successor to `Cookie AutoDelete` extension |🧹 Automatically clears site data (cookies, local storage, IndexedDB, Cache, SW) when you close a site's last tab, with full support for Firefox Containers 📦 and Firefox for Android 📱.

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Features & Capabilities

Auto-Clear Site Data automatically wipes cookies, localStorage, IndexedDB, cache, and service workers when you leave a site — whether you close the last tab, navigate away, or the browser discards it. Stay private and keep your storage clean without lifting a finger. 🧹

Key features include configurable delays, startup cleanup, and independent exemption rules (Whitelist/Blacklist) plus per-container rules for Firefox Containers and granular data-type controls. It’s fully local, privacy-first, and designed for performance with smart dependency tracking and deferred clearing.

User Growth & Download Statistics

Add-on Privacy & Security Developer Tools Data Open Source

By:

Daily users:

Rating:

Version:

3.18.2 Last updated: 2026-07-03

Version code:

6337022

Creation date:

2025-10-26

Risk:

Permissions:

Host permissions:

<all_urls>

Size:

128.55KB

URLs:

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-13

Compare stats and ranking:

Ranking

# 12,842 ▲ 231

Other rankings

#32 in data keyword 54

#33 in x data keyword 11

#40 in site keyword 55

#102 in learn keyword 32 ▲ 2

#191 in data privacy keyword 35 ▼ 7

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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:

byuserforuser

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/auto-clear-site-data/

Permission Change History

2025-11-29: Version 3.6.1 → 3.7.1

Add Optional permissions: notifications

2025-11-16: Version 1.44.4 → 2.0.0

Add Host permissions: <all_urls>

Add Permissions: alarms

Remove Permissions: <all_urls>

2025-11-04: Version 1.18 → 1.42.0

Add Permissions: webRequest

User Reviews

Same issue as mr. sparkle. Extension logs me out of several running tabs that have idled in the background. Otherwise great concept, but maybe it get's a little convoluted. CookieAutoDelete was pretty straight forward in comparison.

by Fi*****, 2026-07-02

petition to open source this

by Ch*****, 2026-06-30

View all user reviews ›

Is Auto-Clear Site Data 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.

Auto-Clear Site Data 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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High ****** ********* ** * ****** ******** ******** ********** * ******* ******* *****

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.

Auto-Clear Site Data is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
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