What are cookies and why are they needed. What are cookies? How to enable cookies in your browser? Tracking Cookies - What are they?
To access the Internet, the user uses special browser(Chrome, Opera, Mozilla and others). Despite them great amount, they have general concepts and parameters. One of these are cache files and cookies. With their help, interaction with sites is accelerated, but if they are not removed periodically, the browser may, on the contrary, slow down. Let's take a closer look at what these concepts are, how and when to delete these files.
If we talk about an Internet browser, then the cache is a copy of the web pages that the user has viewed. If he visits the site again, then it is loaded not from the Internet, but from hard drive where the information is stored.
The cache needs to be cleared periodically. Firstly, the design of pages can change, so the pages are not displayed correctly for the user. Secondly, the capacity of a hard drive is not unlimited, so it should be freed from unnecessary information.
A cookie is a small piece of data that a user sends to a website, which is stored on your hard drive to speed up the experience of frequently visited sites. Such data is used primarily for the following purposes:
- user authentication;
- storage of personal preferences (site version, interface language, etc.);
- maintaining statistics;
- storage of contact information (name, address, telephone, Email etc., for example, for purchases in online stores).
It is also recommended to periodically delete these files. In addition, there is a possibility of interception of personal data through the use of third parties and malware. Because of this, the security of your accounts may be at risk.
Google Chrome is one of the most popular browsers among Internet users. To delete cookies and cache, just follow a few simple steps.
How to delete cookies and cache in Mozilla browser FireFox Another popular application for accessing the Internet is Mozilla. The principle of deleting cookies and cache is slightly different, but in general it will not take users more than a few minutes. To do this, just follow a few steps.
How to delete cookies and cache in the Opera browser Among popular programs Opera is a must-have option for browsing websites. This browser is as easy to use as the others, so clearing cookies and cache will not cause any difficulties for the user.
How to clear cookies and cache in your browser Internet Explorer
Internet Explorer is one of the most hated browsers among Internet users. However, some people use this program to browse websites because it is standard on most versions of Windows OS.
If you need to delete cookies and cache in Internet Explorer, then you should follow these steps:
How to clear cookies and cache in Yandex Browser The most popular search engine in Russia invites users to use its program to browse websites. It also needs to periodically clear its cookies and cache to function properly. To remove them, you need to follow the following steps.
Alternative way to delete cookies and cache files If the user uses different browsers to browse the Internet, then clearing the cache and cookies may take a lot of time. To quickly get rid of unnecessary files, you can install CCleaner on your computer. It is provided to users free of charge.
It is important to note that instructions for deleting cookies and cache may vary depending on the version of your browser. If you use other helper programs to delete files, please share your feedback with other ProfitGid readers.
Cookies are small files service type with text information that is stored in the computer browser. They contain certain data from the sites you visit. The simplest example Cookies work by remembering your account registration data on various sites. If you enter your login and password on a site and allow the browser to remember them, you will not need to enter this data the next time to visit the site. You will be automatically logged in when you log into the site. And you will access this site with automatic authorization until the site server is reset or until you delete the browser using special uninstaller programs. These, after directly removing the browser itself from the system, ensure subsequent cleaning of the remaining data.
Cookies are not only storehouses of your registration data on websites; cookies can also store your other settings - for example, design, your region, etc.
Using web server cookies, they keep statistics about you, showing you the information you need. You've probably noticed advertisements on websites specifically related to the topic. key queries that you recently entered into a search engine. Search engines, like no one else, are interested in showing you their advertising exactly on the topic of what you are looking for in them. If you, while on a website, click on the advertising banner, cookies can analyze your action and determine the theme of the banner in order to subsequently show you advertising in this particular thematic niche.
Almost all sites with authorization - services, social platforms, online stores - require the user's browser to accept cookies. Cookies play a special role in the operation of online stores. A buyer can select several products in an online store, and before he makes a purchase, he can make a lot of moves around the site in search of necessary goods. And he obviously won’t like the fact that some of the goods that he chose in the first place will disappear without a trace, without waiting for the end of shopping. Which products the buyer has chosen - this data is stored in cookies, thereby providing customers with a comfortable online shopping experience.
What happens if you delete cookies?If you want to clear your browser of cookies, you do not have to complete removal browser, you can only delete cookies. If you delete cookies, all entered logins, passwords, regional and design settings will disappear, and you will no longer be shown classified advertising. You will receive a clean browser, just like after installing it, however, with your bookmarks, express panel settings, installed extensions and so on.
As you can see, nothing potentially important will disappear; regional or design settings of your favorite sites can be easily restored, and logins and passwords can be re-entered. The only problem may be that you do not remember the passwords to some important site. It is better to store logins and passwords for important sites in a separate text file or use special software for storing passwords. A browser, if several users have access to a computer or laptop, is far from the most reliable place to store confidential data.
Why delete cookies periodically?Cookies have always been a concern for advanced Internet users - those who are aware of their existence and role. Tracking data entered into a browser is essentially spying on people's personal lives. Moreover, if the user does not use encryption when connecting to the web server, cookies can be easily intercepted and replaced. For example, to gain access to this user’s account on some website. After all, cookies store not only the registration data of a user’s account on a particular site, but also the identifier of the session of his stay on this site.
In summary, we have two main reasons to periodically delete cookies:
— So that web services do not collect data about your visits or for their advertising purposes;
— To prevent attackers from stealing your confidential data and preventing them from acting on the Internet on your behalf.
How to delete cookies?Let's look at below ways to delete cookies through the menu individual browsers and with the help special program CCleaner.
How to delete cookies in Opera?In your browser, open the main menu and select “Settings”.
Then in “Settings”, go to the “Privacy and Security” tab.
In the "Cookies" section, you can disable cookies or allow them to be stored only during one session before exiting the browser. To do this, check the appropriate boxes. To delete cookies, click "All cookies and site data".
In the window that opens, you can manually select individual sites and delete their cookies. The “Delete all” button will accordingly delete all cookies.
In the Mozilla Firefox browser, open the “Tools” menu, then “Settings”.
In “Settings” Open the “Privacy” tab. Here you can also set options to disable cookies in the “Tracking” section.
In the window that opens, select individual sites and delete cookies for each such site separately or use the “Delete all cookies” button.
To delete cookies in Google browser Chrome, go to its “Settings".
In “Settings” Find the “Personal data” section and click the “Content settings” option.
In the window that opens, click “All cookies and site data"
The “Delete all” button will, accordingly, delete all cookies. To delete cookies for individual sites, find those sites and delete their cookies using the corresponding button.
Remove cookies from Internet browser Explorer can also be found in its “Settings”. Open them and select “Internet Options”.
General Delete".
From the start, the desired tab will open - “General", here you need to click the “Delete" button.
This menu contains separate browser cleaning options. To remove cookies, uncheck the boxes. unnecessary options and leave the default option "Cookies and website data". Click the “Delete” button.
If you use different browsers, so as not to delve into their settings, it’s easier to learn a couple of functions of a single browser designed to clean and optimize the system. CCleaner is free program one of the “Must-haves”, which ensures basic computer hygiene - cleaning and optimization system registry, cleaning the system from unnecessary files, uninstalling programs, startup settings, etc. Removing cookies is part of CCleaner's ability to clear your system of unnecessary files.
Open CCleaner and stay on the first tab that opens, “Cleaning".
There are already preinstalled some options for cleaning the system from files that impede its performance, and deleting cookies is among these options. In the “Windows” tab there are options for cleaning the Internet Explorer browser; options for cleaning other browsers - all that are installed on the computer - are located in the adjacent tab - “Applications”.
Please review your system cleanup options carefully. CCleaner program, if this is your first time encountering it. Uncheck the data that you do not want to delete yet. Then click the “Analyze” button.
Review the data that CCleaner has prepared for deletion again. And (if you haven’t changed your mind about deleting something) click the “Cleanup” button. Follow the program instructions.
If you've ever had to deal with computer technical support, then you're familiar with the main question from the technicians: “Did you delete your cookies?” But if the first time a person does not understand what the matter is, then each subsequent appeal puts him in an awkward situation. What are these files for and why should you delete them?
What are cookies?These mysterious files are small packages data in the form of fragments text information, sent to your computer from all the sites you visit. Thus, cookies contain information about your activities on a particular page. It's just that the browser you use saves it in a compressed form. All basic information is displayed there: passwords, username, changing settings for the site and everything that you added to the cart when making a purchase in the online store. 
This is very convenient, because until you delete cookies, you will not have to re-enter your password and perform other unnecessary manipulations every time you go to this page. All the material you operated on is already saved in the browser. There are a few different types such files, which can behave differently: some of them are deleted automatically after closing the visiting window, and some are sent to HDD and will be stored there until you delete them manually. 
The word cookie in English language means "cookies". Why did programmers come up with such a funny name for these files? Everything is very simple. Their concept is similar to Chinese fortune cookies, when a person, having tasted the delicacy, receives notes with fortunes hidden inside. So it is here. Cookies store all the basic information, which, however, can be very useful for hackers. 
These files work in background, so they don’t bother the user. However, they need to be removed from time to time, and here's why. The cached data stored in these files sometimes interferes with the website. This happens if the page is automatically refreshed. This causes the download to fail again. This means only one thing: the data is outdated and needs to be gotten rid of. Otherwise, access to some sites is temporarily blocked for you. 
In addition, text fragments accumulate on your hard drive, which ultimately leads to the occupation of some space on your computer. And although each file “weighs” only a few kilobytes, if they are put together and left untouched for long enough, it can cause certain problems. 
If you don’t want your household, work colleagues, or burglars to be able to track your activities on the Internet, use incognito mode. 
And one more thing: if you decide to delete cookies, clear the cache memory at the same time. It's a very simple process. Open your browser settings and go to the “personal data” section. There you will see the “clear history” function, in which you can select the options that interest you.
Cookies are a technology that allows a website to “remember” a user,
save his settings and not ask him for his login and password every time. Can
think that if you delete cookies in your browser, the site will not recognize you. But this one
Confidence is deceptive.
You can worry about your anonymity as much as you like, use a proxy
and VPN, forge HTTP request headers that reveal the system being used,
browser version, time zone and a lot of other information, but the website doesn’t care
There will still be ways to recognize the fact that you have already been there. In many
in cases this is not particularly critical, but not in a situation where at some
service you need to introduce yourself as another user or simply save
anonymity. It’s easy to imagine how the anti-fraud system of some kind of conventional
financial organization, if it determines that transactions were carried out from one computer
authorization under the accounts of completely different people. And isn't it nice?
realize that someone on the Internet can track your movements? Hardly. But
first things first.
Cookies have been used for centuries to identify users.
Cookies (from English "cookies") are a small piece of text information,
which the server sends to the browser. When a user accesses the server
(types its address in the browser line), the server can read the information,
contained in cookies, and based on its analysis, perform any actions.
For example, in the case of authorized access to something via the web in cookies
login and password are saved during the session, which allows the user not to
enter them again when prompted for each password-protected document. So
This way the website can "remember" the user. Technically it looks like
in the following way. When requesting a page, the browser sends a short
HTTP request text.
For example, to access the page www.example.org/index.html the browser
sends the following request to the www.example.org server:
GET /index.html HTTP/1.1
Host: www.example.org
The server responds by sending the requested page along with the text,
containing the HTTP response. This may instruct the browser to save cookies:
HTTP/1.1 200 OK
Content-type: text/html
Set-Cookie: name=value
If there is a Set-cookie line, the browser remembers the line name=value (name =
value) and sends it back to the server with each subsequent request:
GET /spec.html HTTP/1.1
Host: www.example.org
Cookie: name=value
Accept: */*
Everything is very simple. If the server received cookies from the client and it has them in
database, he can definitely process them. So, if it were cookies with
the user will not have some information about authorization at the time of visiting
you will be asked for login and password. According to the standard, cookies have a certain lifespan
(even though it can be very large), after which they die. And any
the user can easily delete saved cookies by using
the corresponding option, which is available in any browser. This fact is very
upsets the owners of many resources who do not want to lose touch with
visitor. It is important for them to track him, to understand that “this person was with us
yesterday, and the day before yesterday, etc." This is especially true for various analyzers
traffic, systems for maintaining statistics, banner networks and so on. This is where
the fun begins, because developers use all sorts of
tricks that many users are not even aware of. They're on the move
various tricks.
The thing is that in addition to the usual HTTP “goodies”, which everyone has long been interested in
got used to it, now alternative storages are actively used, where the browser
can write data on the client side. The first thing to mention is
storage of what you love and hate at the same time Flash (for those users who
which it is installed). Data is stored in so-called LSO (Local Shared
Objects) - files similar in format to cookies that are saved locally on
user's computer. The approach is in many ways similar to conventional "goodies" (in this
case, a small amount is also stored on the user’s computer.
text data), but has some advantages:
- Flash cookies are common to all browsers on a computer (unlike
from the classic cookie, which is tied to the browser). Settings, information
about the session, as well as, say, a certain identifier for user tracking,
are not tied to any specific browser, but become common for
everyone. - Flash cookies allow you to store much more data (as
usually 100 KB), which increases the number user settings,
available for saving.
In practice, LSO becomes a very simple and accessible tracking technology
user. Think about it: if I suggested you remove all the “goodies” in
system, would you remember about Flash cookies? Probably not. Now try to take
any viewer, for example, free
FlashCookiesView and see how many interesting things are recorded in
Flash repositories. A list of sites that really don’t want to
lose your trace, even if you clear your browser cache (along with the goodies).
But if advanced users and even more or less good users have heard about LSO
developers, then the existence of other data storage techniques, sometimes very
sophisticated (but effective), many do not even suspect. At least take new ones
repositories that appeared in
(Session Storage,
Local Storage, Global Storage, Database Storage via SQLite), about which you can
read in the article "". A Polish specialist was seriously confused by this problem
on safety Samy Kamkar. As a result, a special
Evercookie JavaScript library, which is specifically designed to
create the most durable cookies in the browser. Someone may ask: "Why
is this necessary?" Very simple: in order to uniquely identify
page visitor if he comes again. Such difficult-to-kill cookies are often
are called Tracking cookies and are even detected by some antiviruses as
threat to privacy. Evercookie can reduce all attempts to remain anonymous to
zero.
The secret is that evercookie uses everything available to the browser at once
storage: regular HTTP cookies, LSO, HTML5 containers. In addition, it comes into play
several cunning tricks that, with no less success, allow you to leave
computer the desired mark. Among them: generation of special PNG images,
using history browser, storing data using ETag tag, container
userData in Internet Explorer - it turns out that there are a lot of options.
You can see how effectively this works on the website.
developer -
http://samy.pl/evercookie. If you click on the "Click to create an
evercookie", cookies will be created in the browser with random number. Try
delete cookies wherever possible. I bet now you
I thought: “Where else can I delete cookies, except in the browser settings?”
Are you sure you deleted everything? Reload the page to be sure, you can even do it again
open browser. Now feel free to click on the “Click to rediscover cookies” button.
WTF? This did not prevent the site from taking data from somewhere - in the page fields
the number that was saved in cookies was displayed. But did we rub them? How
did it work? Let's try to understand some techniques.
An extremely interesting technique used in Evercookie is the approach
storing data in cached PNG images. When evercookie sets
cookies, it accesses the evercookie_png.php script with a special HTTP “bun”,
different from the one used for storage standard information O
sessions. These special cookies are read by a PHP script that creates
A PNG image in which all RGB (color) values are set according to
with information about the session. Ultimately the PNG file is sent to the client's browser
with the note: “the file must be cached for 20 years.”
Having received this data, evercookie deletes the previously created special
HTTP cookies, then makes the same request to the same PHP script, but not
providing information about the user. He sees that the data he is interested in
no, and it cannot generate a PNG. Instead, the browser returns
fake HTTP response "304 Not Modified" which causes it to pull the file from
local cache. The image from the cache is inserted into the page using the tag
HTML5 Canvas. Once this happens, evercookie reads every pixel
Canvas content, extracting the RGB values and thus restoring
the original cookie data that was stored in the image. Voila, that's it
works.
Another technique uses browser history directly. Once the browser
installs the bun, evercookie encodes the data using the Base64 algorithm,
which need to be preserved. Let's assume that this data is a string,
the resulting "bcde" after conversion to Base64. Library sequentially
accesses the following URLs in the background:
google.com/evercookie/cache/b
google.com/evercookie/cache/bc
google.com/evercookie/cache/bcd
google.com/evercookie/cache/bcde
google.com/evercookie/cache/bcde-
So these URLs are saved in history. Next comes a special
technique - CSS History Knocker, which, using a JS script and CSS, allows
check whether the user visited the specified resource or not (more details here -
samy.pl/csshack). For
evercookie bun checks run through all possible Base64 characters on
google.com/evercookie/cache, starting with the character "a" and moving on, but only
for one character. Once the script sees the URL that was accessed, it
starts searching for the next character. It turns out to be a kind of brute force. In practice
this selection is carried out extremely quickly, because there are no requests to
server are not executed. Search in history is carried out locally as much as possible
short term. The library knows it has reached the end of the line when the URL is
end with the symbol "-". We decode Base64 and get our data. How
name browser developers who allow this?
What happens if the user rubs his cookies? An important feature of the library itself
evercookie is that the user will have to try hard to
delete cookies left in different places - now there are 10 of them. If in at least one
If the cookie data remains in place, it will automatically be restored in all other
places. For example, if the user not only deletes his standard cookies, but
and clear LSO data, clean up HTML5 storages, which is already unlikely, anyway
The cookies created using the cached PNG and web history will remain. At
the next time you visit a site with evercookie, the library will not only be able to find
hidden bun, but will also restore them in all other places that
supports client browser. An interesting point is related to the transfer
"goodies" between browsers. If the user receives cookies in one browser,
that is, there is a high probability that they will be reproduced in others. The only thing
a necessary condition for this is saving the data in a Local Shared Object cookie.
The Evercookie library is completely open, so you can freely
use it and customize it to suit your needs. The server is not presented with any
serious requirements. All you need is access to a JS script in which
contains the evercookie code. To use Flash cookies (Local Shared Object),
there must be a file evercookie.swf in the folder with the script, and for the technician to work,
based on PNG caching and the use of ETag storage, access to
PHP scripts evercookie_png.php and evercookie_etag.php. Use evercookie
You can do this on any page of the site by connecting the following script:
var ec = new evercookie();
// set cookie "id" with value "12345"
// syntax: ec.set(key, value)
ec.set("id", "12345");
// restore the cookie with the name "id"
ec.get("id", function(value)
{
alert("Cookie value is " + value)
});
There is also another way to obtain cookies, based on using more
advanced callback function. This allows you to extract cookie values from
various storages used and compare them with each other:
function getCookie(best_candidate, all_candidates)
{
alert("The retrieved cookie is: " + best_candidate + "\n" + "You
can see what each storage mechanism returned " + "by looping through the all
candidates object.");
For (var item in all_candidates) document.write("Storage
mechanism " + item + " returned: " + all_candidates + "
");
}
ec.get("id", getCookie);
The evercookie library is available to everyone. It's a little scary, especially if
You have absolutely no idea what you can do against her.
There are no problems with clearing cookies in the browser and Flash. But try
delete the data wherever evercookie has been left behind! After all, if you leave the cookies in one
place - the script will automatically restore the value in all others
storages. Essentially this library is a good mode checker
privacy, which almost all browsers now have. And that's what I tell you
I’ll say: from Google Chrome, Opera, Internet Explorer and Safari, only the last one
"Private Browsing" mode completely blocked all methods used
evercookie. That is, after closing and opening the browser, the script could not
restore the value it left. There is reason to think. Moreover, in
in the near future, the developer evercookie promised to add more to the library
several data storage techniques, including using Isolated technology
Storage in Silverlight, as well as a Java applet.
Very often among computer users you can hear different opinions about the dangers that so-called cookies pose, as well as the fact that they must always be removed from the system in order to ensure normal work computer. Reports of the harm that cookies cause sometimes reach the point of absurdity and look more like paranoia.
But are cookies really dangerous?
Do I need to clean my computer every day to delete cookies?
In this article, let's try to get answers to these and other questions related to such a controversial concept as cookies.
First, let's define what cookies are and where they come from.
So cookies are small text files, which are usually created by some web page that we have visited on the Internet. By default, the creation of such files occurs unnoticed by us, and therefore, most often we do not even know which of the visited web pages will create cookies on our computer and which will not.
Our browser can write to these files various information about us (more on this below), after which such a file is stored on our computer until we revisit the page that placed the cookie on our computer. When you visit the web page again, the information recorded in this file is read and thanks to this, we are “recognized” on this site.
Cookies can be compared to a watchman (concierge) at the entrance of an apartment building - the first time he demands to show a pass (or provide some data), and the second time he recognizes us and lets us in just like that. Over time, he begins to greet us and by asking (among other things) questions, he can know more and more about us (what apartment we go to, how many relatives we have, what we buy, where we vacation, etc.). Gradually, the watchman will have even more accumulated information and, using it, he will begin to advise us something (according to our interests), congratulate us on our birthday, offer some kind of help or services, and perhaps even sell something.
Here I would like to draw your attention to the fact that most often there is nothing wrong with this if the watchman does it from the bottom of his heart and not very often. If his “services” become intrusive, then everyone will get tired of it and one day this watchman will be fired (the cookies will be deleted). But in any case, after a while a new watchman will take his place, and the collection of information will begin all over again...
I think you already get the main idea!
Cookies are the same guards, but only in the form of files on our computer containing information in text form. For each individual site on our computer there is a watchman (or even several) and most often they do not do anything wrong, because... their main purpose is to collect information.
But what kind of information is collected through our computer, how and why this is done, let’s figure it out... And at the same time, let’s understand the myths about cookies in order to understand what cookies cannot do.
Why are cookies needed:2. Cookies may be used to make it easier to enter information into forms on the site.
Cookies can remember the information we entered on the site (for example, name, e-mail, telephone number or home address) and next time they themselves enter the data into the required form on this site, thereby facilitating the work of filling out forms.
3. Cookies may be used to store personal settings on a particular site.
This is usually done in order to create a more comfortable experience for the user on the site (in accordance with individual preferences).
For example, we can indicate what kind of website design and communication language we like, and indicate our location and time zone. The next time we visit the site, we will not need to make these settings again - we will immediately see it in the desired color and on required language, and we will also see, for example, a weather forecast for our city (the site view will be generated “for us” according to the saved settings).
4. Cookies can be used to track user actions on the site.
For example, on the websites of online stores, information about the purchases we make, discounts and bonuses, as well as the status of the shopping cart can be tracked for subsequent checkout.
Let’s say we “walk” through an online store, spend a long time choosing what we need among all the variety, and finally, we place the product we like in a virtual shopping cart, and cookies remember this (an entry is added to the file). On the next page we add another product, then another one, and the cookies are constantly updated. If this did not happen, then on each subsequent page of this store the cart would again be empty.
Thus, it is clear that on such sites without cookies, the whole point of shopping is lost - we would have to register and order each product separately.
And here is the time to talk about the “horror cookies” that are common among users and understand what cookies are not and what they do not do.
Misconception No. 1: Cookies independently steal and send information, and with their help, any attacker can find out whatever they want about us.
Actually this is not true. Information is placed in cookies only if we have provided it ourselves (manually entered it into the appropriate form on the website) or given access to it. Without our permission, cookies cannot access information and cannot view files on our computer.
I would also like to draw your attention to the fact that if we have cookies that were created on a specific site, then these cookies will allow information to be saved by this particular site, and NOT ALL in a row.
Misconception #2: Cookies are a type of virus and can therefore harm your computer.
In fact, you need to understand that cookies are not programs, but ordinary text data, so they cannot run on their own and perform any actions. The text itself cannot launch a virus, spy (send secret data), or erase data from the hard drive. It also follows that cookies cannot send/receive SPAM, cannot launch pop-up advertising windows etc.
These are perhaps the two most common myths and as you can see, they have nothing to do with the truth - cookies simply store information about the user in order (for the most part) to make his life on the Internet easier.
Well, to paint a complete picture about cookies, we need to note some more harmful consequences of storing them on a computer, and also talk about deleting them.
Firstly, if you do not delete cookies (at least sometimes), then over time (with constant use of the Internet) quite a lot of them accumulate on the computer and they begin to take up space on the hard drive. And because Cookies are usually stored on system disk, then the system may begin to “slow down” (due to insufficient volume free space on this disk).
Secondly, it is necessary to erase cookies in cases where it is necessary to hide traces of your computer activity or there are suspicions that our computer could be used by an attacker. If we have nothing to hide (in terms of sites visited and information entered on them), then it is not necessary to delete cookies.
In any case, everyone decides for themselves whether to delete cookies or not. Cookies do not carry anything really dangerous, but deleting them does not threaten anything terrible, except that on some sites you will have to re-authorize (not to be confused with registration).
Where are cookies stored?For each browser cookies files are located in their place, I will give an example of the most common
- Google Chrome > C:\Users\username\AppData\Local\Google\Chrome\User Data
- Yandex browser > C:\Users\username\AppData\Local\Yandex\YandexBrowser\User Data\Default
- Opera > C:\Users\username\AppData\Roaming\Opera Software\Opera Stable\Storage\ext\sync-login\def
- Mozilla > C:\Users\username\AppData\Roaming\Mozilla\Firefox\Profiles\
- IE > C:\Users\username\AppData\Local\Microsoft\Windows\INetCache
Just read about everything here using ccleaner and there you can find them link below in the paragraph about deletion.
You can delete cookies directly in our browser settings. You can delete all cookies at once, or you can only delete cookies for individual sites. Moreover, in the browser settings you can specify that it (the browser) asks us for permission to create new cookies or automatically deletes all cookies when closing the browser.
Now I think you understand what cookies are, how they are used and how they are managed.