Do Browser Tabs share Cookies (Detailed Explanation)

Are you sensitive about Browser Cookies? Or do you someone belong to Security or Penetration Testing field?

For any possible reason, you are most likely wanted to know – Do Browser Tabs share Cookies?

Let’s uncover the subject in more detail.




In this write-up today, you will also learn additional information about the subject. However, if you want to skip to the specific section, you can do so Here.

Here is a brief list of Table of Content items.

Table of Content

So, let’s dive deep into the subject matter without further delay.

Introduction to Web Browsers

Web Browsers are also called Application software for browsing the Internet.

A Web Browser is software That helps you browse the Internet. In simple words, if you need to access the Internet and resources on the Internet, you will need a Web Browser for the said purpose.

Google Chrome, Opera, and Firefox are the trending examples of modern Web Browsers.

In the Technical world, you can call a Web Browser software That communicates to the Web Server.

In simple words, when you request the server, by entering a Link in Web Browser, it is the Browser That helps you communicate with the Server and fetch the required resources to show.




On the other hand, a Web Server refers to a powerful computer That hosts Internet pages, such as Documents, Web Pages, and Downloads.

What are Browser Tabs?

Browser Tabs are separate pages opened in a Web Browser at a Time. For example, if you want to access multiple pages at the same time, you will need to open new Tabs in a Web Browser.

For example, in Google Chrome, you can open Browser Tabs by clicking on the small Plus sign placed at the right of an opened Tab.

What are Browser Cookies?

Cookies are sensitive information created by a Web Browser to create, track, and validate a user’s session at a given Time.

For example, the Browser creates Cookies to help Server understand who is requesting a specific kind of resource. In simple words, Browser Cookies validate and differentiate users from each other, such as Logged in users from random ones.

Do Browser Tabs share Cookies?

Browser Tabs share Cookies as long as certain measures are met, such as the Tabs should have loaded the same websites if they share Cookies.

In this case, for example, if a user is logged in to Facebook, a new Tab with Facebook’s Home page automatically redirects the user to his or her Facebook Feed or logged-in account.

In this case, you can understand That the Two Browser Tabs share Facebook Cookies because both Tabs access the same Web Application, Facebook in this case.

On the other hand, if you are logged into a website, let’s say Facebook, and you have browsed another website, let’s say Instagram. In this case, there is no relation between Cookies created by Facebook and Instagram, because both are two different platforms.




In this case, even if you log into Instagram, the Browser Tab cannot fetch Cookies from the Tab that has loaded Facebook. In simple words, Two different websites, Logged in or not, cannot share Cookies.

Browser Cookies are stored in the local computer’s HDD in the form of small files. But remember, as we described above, Browser Cookies are specific to websites, which means Two different websites can’t use the same Browser Cookies.

The creation of Cookies depends on Client-Server connections and the way a Website works. In this case, a client refers to the computer you are using to access the Internet. In the same manner, a Server represents the Web Server That hosts Internet files, while a Web Application refers to the website you are currently accessing in a Web Browser.

Conclusion of Article

So, do Browser Tabs share Cookies?

It depends on several factors as discussed above.

If multiple Tabs are accessing the same website, they may share Cookies if needed. On the other hand, Two different websites in multiple Tabs cannot share Browser Cookies.




Cookies are sensitive and are kept private in a Web Browser. Even if you access a Cookies file on the local HDD, you will be unable to read it properly.

If you need more information on Browser Cookies, please join the conversation in the comments.

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