Flag Cookies
By: Jan Riechers
A cookie and browser storage data manager on steroids to mark, 'flag', and manage cookies using rulesets.
English
Español
Français
Português
日本語
简体中文
한국인
Features & Capabilities
User Growth & Download Statistics
- By:
- Jan Riechers
- Daily users:
- 11,631 15
- Rating:
- 3.68 (31)
- Version:
- 3.6.7 Last updated: 2025-01-17
- Version code:
- 5874066
- Creation date:
- 2017-12-24
- Risk:
- Very high risk impact Low risk likelihood
- Permissions:
- cookies
- tabs
- webRequest
- storage
- unlimitedStorage
- clipboardWrite
- notifications
- contextualIdentities
- webNavigation
- cookies
- Host permissions:
- <all_urls>
- <all_urls>
- Content scripts matches:
- *
- *
- Size:
- 343.57KB
- Email:
- ja*****@dwrox.net
- URLs:
- Website ,Privacy policy
- Full description:
- See detailed description
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-06-14
- Compare stats and ranking:
-
Contact the developer
Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Permission Change History
2024-12-23: Version 3.6.0 → 3.6.3
Add Host permissions: <all_urls>
Add Permissions: webNavigation
Remove Permissions: <all_urls>
2023-11-30: Version 3.2.1 → 3.4.0
Remove Permissions: webNavigation
2023-01-11: Version 3.1.8 → 3.1.12
Add Permissions: webNavigation
User Reviews
The add-on generally works as advertised and aids cookie-related tasks, including exporting cookies. However, a dominant recurring issue is excessive memory usage (memory leaks), sometimes accompanied by high CPU use, particularly with many tabs or long sessions. This memory problem is the most consistently mentioned drawback across reviews. Pros
- Does what it claims and works as advertised
- Useful for cookie-related tasks, including exporting cookies to clipboard in JSON (e.g., for login sessions)
Cons
- High memory usage / memory leaks, especially with many tabs or Reddit sessions
Recent reviews
The extension works, but currently leaks memory on Reddit tabs like there's no tomorrow.
by Fi*****, 2026-02-04
This extension does what it says it does, and if you use it for a one-time use and then remove it no issue. The issue is that if you decide to keep the extension it will use up all of your memory! It has some sort of leak or lack of optimization that causes it to slow my 32GB DDR5 machine to a crawl. Without this extension only 6GB of use, with this extension all of it can be used!
by Fi*****, 2025-11-29
This extension was really useful! I had to get cookies for JDownloader lots of times and it worked perfectly.
The only problem I've noticed is that the RAM usage goes up the roof with it enabled. Six Reddit tabs open were using 10GB, I don't know if that is a memory leak or just how it works, but I'd advise everyone to leave it disabled.
It hasn't been updated since January, perhaps something changed and broke it?
by ga*****, 2025-11-14
Is Flag Cookies 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.
Flag Cookies requires a lot of sensitive permissions. 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.
Flag Cookies has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- Medium This extension has medium user count. Unpopular extensions may not be stable or safe.
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