CRX id
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Description from extension meta
A cookie and browser storage data manager on steroids to mark, 'flag', and manage cookies using rulesets.
Image from store
Description from store
Important privacy notice:
- No cookie information besides the name and domain name are stored inside FlagCookies to work, no values, no direct details.
- No session data or details are stored or processed
- No history of visited domains or websites or any other tracking is used.
Before you use this addon:
This add-on is mainly aimed at power users, this might sound harsh, but it is not!
To get the most out of FlagCookies, you have to define either own cookie rules for websites and or make use of `Global Flag`, or `Auto flag`, or `Profile` mode(s).
Also, in case you use payment services, be advised to disable the "Global flag" feature temporarily. For example when using Paypal or other shopping/payment provider websites and services.
Long story made short - Basic usage:
1) Use `Global mode` if you are surfing, this will remove all kind of cookies while browsing the web if not protected by `profile` mode, or explicitly are set as protected.
2) Use `Auto flag` which will remove all cookies for one website/domain - this can be useful if you only want to automatically remove these page cookies every time you browse this website.
3) Use `Profile mode` either globally for a website, protecting all cookies of that domain if no cookies are picked as profile cookies. Or protect single cookies even when `Global flag` or `Auto flag` modes are active.
4) `Click / Flag` and set rules for each cookie individually, works together with the other modes.
Note: It is possible to export detected cookies into a json file or into the clipboard, used by JDownloader2, from the `Settings` tab inside of FlagCookies. More information can be found at the Github.
Some features are:
* Detects and displays stored browser cookies, storage data, and be able to manage (flag) and delete those while browsing, either automatically through ***global*** or ***auto flag*** mode or by explicit decision
* **Flag cookies** either to be explicitly **deleted** even without *global* or *auto flag* mode or set them to be **permitted** or protected from removal by *global* or *auto flag* modes
* **Profile** mode for a domain or cookies - to switch between *logged into a website/service* and *not logged in* modes in order to remove or keep cookies on demand
* **Auto flag** mode only affecting this particular (sub)domain, removing every domain cookie which is not permitted or used as ***profile cookie***, this also includes third-party and cross origin cookies.
* Support for *Firefox Multi-Account-Containers*
* **Preferences** allowing to import and export settings to a ZIP file. Import does not work in private windows!
* **Preferences** allows to manage *logged in profile* cookies, delete all domain settings and add-on settings
* An **Action log** avaible in Preferences which provides output of what FlagCookies is doing. The **Action log** is disabled by default due to performance improvements and RAM usage - even so the log is cleared mostly on reload
* **Displays count** of deleted cookies in the browser toolbar icon and in addition a breakdown summary of the action log when hovering the toolbar icon if the action log is enabled
* Optional **notifications**
* Support for firstPartyIsolate/firstPartyDomain cookies
* Support for container tabs/contextual identities
Providing feedback/feature wishes/ideas:
Please file an issue on the issues page. I gladly try to respond to feedback and to improve Flag cookies. If you think a feature is missing or at worst, not working as expected, please also open an issue.
Thanks and notes
To all who helped so far through critic, general feedback and ideas. Keeps me going! And of course for everyone supporting the project in this or the other way.
German speaking thread @ ngb.to about FlagCookies
https://ngb.to/threads/32496-Firefox-Addon-FlagCookies
Latest reviews
- (2025-04-30) Daniel S: This made my browser slow as hell for a whole week, and only at the end of that week by deleting extensions one by one, I realized that this was the extension making my browsing experience atrocious.
- (2025-03-29) Veith Servius: Slows down browser to a crawl. I thought it was my browser not using hardware acceleration properly but no it was this pos. Do not use.
- (2025-03-21) Ivan Alexeev: This extension seriously slows down the browser, I recommend using others (especially for jdownloader) or disabling it immediately after use.
- (2025-02-27) psychomaniac189: this extension has been making me pull my hair out for the past MONTHS! I couldn't figure out why my chrome browser was so slow. I figured this innocent extension couldn't be the issue, but finally i did through testing with all my plugins and sure enough its this one. NEVER AGAIN! DO NOT USE!!!!!!!!! I would rate it 0 stars if it was possible
- (2024-10-06) jay smith: Received a notification that this was successfully installed, but I did not install it... bloatware
- (2024-07-23) Eric Karnes: First time I've had an extension slow down my entire browsing experience
- (2024-06-19) Brook Skeleton Dragon: Hello Jan, I already tested your extension in the main browsers that I have installed on my laptop then I would like to give you some feedback. In google chrome, when you have the "Flag Cookies" extension turned on the browser's tabs starts to load really slow and if you try to type an url or something it feels laggy. About mozilla firefox, opera and microsoft edge all goes ok.
- (2024-04-29) Valentijn: Very useful plugin. However, it has been slowing down my entire browser for the past few months. Anytime the plugin is active, websites like Google Maps become very sluggish and take long to load. This has to be addressed
- (2024-04-19) Alex King: slows down almost all websites constantly. do not use until this is fixed
- (2024-04-12) Edwin Oude Vrielink: Brought my browsing experience to a grinding halt. Hogging the CPU. Didn't use to do this but it started doing so in April 2024.
- (2024-04-05) Nathan Van Riet: Extremely slowing down all kinds of websites. Doesn't always work either.
- (2024-02-26) Steve Sunny: Was wondering what was slowing down my browser, this was the culprit.
- (2024-02-23) Anthony Reinking: Was working great; after the last Chrome update I can't use Chrome anymore as it is completely bogged down when this extension is enabled. Please fix this as I LOVED your extension. Thank you.
- (2024-02-18) Fermin Cirella (Letrix): Slows down browser
- (2024-02-18) Serge Jutah: Strongly slows down my browser
- (2024-02-16) Yulin Liu: The most recent update (Feb 5, 2024) made this extension a resource hog, it consumes an astronomical amount of CPU and makes everything slow.
- (2024-02-15) Gaming Stig: I've been using this for a long time and it does the job. But just recent it is making chrome to run slow, especially when going into streaming platform. I've tested it turning the extension on and off, and I notice a significant speed difference.
- (2024-02-12) Ben: Works fine but often creates constant cpu usage on Edge and sometimes slows my browser to a crawl. I immediately disable the extension when not using it.
- (2024-01-08) David: Sends a push notification about updating just about every single time I open the browser. Hard pass.
- (2023-12-10) Volker Walbröhl: never requested but suddenly installed ... reported!
- (2023-11-19) t o: This is malicious software that sends out intrusive notifications asking you to leave a review.
- (2023-07-31) rafael perdomo: La verdad parece algo mas que una herramienta, consume recursos del navegador como un malware y es demaciado tedioso hacer cosas simples, tanto que decidi buscar otras herramientas que hicieran un trabajo mas eficiente, ni con publicidad se salva y la unica razon por la que la volvi a instalar fue para dar mi reseña, Esperiencia muy mala
- (2023-04-19) A (Siampu): There is absolutely no way this extension should have a larger memory footprint than the entire rest of the browser. On an overpowered gaming PC, this extension makes Chrome run nearly unuseably slow. This was either made by a monkey or is simply malware. https://i.imgur.com/eGyoLPM.png
- (2023-04-19) A (Siampu): There is absolutely no way this extension should have a larger memory footprint than the entire rest of the browser. On an overpowered gaming PC, this extension makes Chrome run nearly unuseably slow. This was either made by a monkey or is simply malware. https://i.imgur.com/eGyoLPM.png
- (2022-09-10) Frak: Did not work with Instagram for use with JDownloader2 on my Mac (High Sierra) 1- Have to keep reloading the tab just to detect cookies even if I just switched to another tab (other extensions don't do this) 2- Once cookies are detected and I go to Preferences and try to export to JSON, it says "No cookie data to export" I ended up using the cookies.txt extension and converting that manually to JSON and copying to clipboard to get it to work with JDownloader2
- (2022-09-10) Frak: Did not work with Instagram for use with JDownloader2 on my Mac (High Sierra) 1- Have to keep reloading the tab just to detect cookies even if I just switched to another tab (other extensions don't do this) 2- Once cookies are detected and I go to Preferences and try to export to JSON, it says "No cookie data to export" I ended up using the cookies.txt extension and converting that manually to JSON and copying to clipboard to get it to work with JDownloader2
- (2021-06-24) Shade Hades: worked in my case to export Google Drive copy into JDownloader
- (2021-06-24) Shade Hades: worked in my case to export Google Drive copy into JDownloader