Cookie storage analysis: detailed explanation of storage locations in different browsers

With the continuous development of Internet technology, our lives are gradually becoming more and more digital, and Web-based applications are becoming more and more common. In web development, Cookie is a very important concept. It is a technology used to store data, which allows the web server to send small data to the client. The client browser stores it locally and requests the same server next time. This data is sent back to the server.

Different browsers do not store and use cookies exactly the same way. This article will give you a detailed introduction to the location and use of cookies by different browsers, and provide specific code examples. .

1. Chrome Browser

The cookie storage location in Chrome browser is in the user data directory of the system, and the paths under different operating systems are slightly different.

In Windows, Chrome's cookie storage location is: C:UsersUserNameAppDataLocalGoogleChromeUser DataDefaultCookies.

In macOS, Chrome's cookie storage location is: /Users/UserName/Library/Application Support/Google/Chrome/Default/Cookies.

In Linux, Chrome’s Cookie storage location is: ~/.config/google-chrome/Default/Cookies.

Chrome browser provides the global chrome.cookies API to operate Cookies. This API can be used in extensions to manipulate Cookies.

The following is a specific code example for setting and obtaining Cookies:

Set Cookies:

chrome.cookies.set({
    'url': 'http://www.example.com',
    'name': 'example_cookie',
    'value': 'example_value'
}, function(cookie) {
    console.log('Cookie set:', cookie);
});

Get Cookies:

chrome.cookies.get({
    'url': 'http://www.example.com',
    'name': 'example_cookie'
}, function(cookie) {
    console.log('Cookie value:', cookie.value);
});

2. Firefox Browser

The cookie storage location in the Firefox browser is also in the user data directory of the system. The paths under different operating systems are slightly different.

In Windows, Firefox's cookie storage location is: C:UsersUserNameAppDataRoamingMozillaFirefoxProfilesProfileNamecookies.sqlite.

In macOS, Firefox's cookie storage location is: /Users/UserName/Library/Application Support/Firefox/Profiles/ProfileName/cookies.sqlite.

In Linux, Firefox's cookie storage location is: ~/.mozilla/firefox/ProfileName/cookies.sqlite.

Firefox browser provides the global Services.cookies API to operate Cookies. This API can be used in extensions to manipulate Cookies.

The following is a specific code example for setting and obtaining Cookies:

Set Cookies:

let cookieMgr = Components.classes["@mozilla.org/cookiemanager;1"].getService(Components.interfaces.nsICookieManager);

let cookieUri = Components.classes["@mozilla.org/network/io-service;1"].getService(Components.interfaces.nsIIOService).newURI("http://www.example.com/", null, null);
let cookie = Components.classes["@mozilla.org/cookieService;1"].getService(Components.interfaces.nsICookieService).createCookie();
cookie.name = "example_cookie";
cookie.value = "example_value";
cookie.host = "www.example.com";
cookie.path = "/";
cookieMgr.add(cookieUri, null, cookie);

Get Cookies:

let cookieMgr = Components.classes["@mozilla.org/cookiemanager;1"].getService(Components.interfaces.nsICookieManager);

let iterator = cookieMgr.enumerator;
let cookieValue = null;

while(iterator.hasMoreElements()) {
    let cookie = iterator.getNext().QueryInterface(Components.interfaces.nsICookie);
    if(cookie.name == "example_cookie" && cookie.host == "www.example.com") {
        cookieValue = cookie.value;
        break;
    }
}

console.log('Cookie value:', cookieValue);

3. Safari Browser

The cookie storage location in the Safari browser is also in the user data directory of the system. The paths under different operating systems are slightly different.

In Windows, Safari's cookie storage location is: Not supported.

In macOS, Safari’s cookie storage location is: /Users/UserName/Library/Cookies/Cookies.binarycookies.

In iOS, Safari's cookie storage location is: /private/var/mobile/Containers/Data/Application/ApplicationName/Library/Cookies/Cookies.binarycookies.

Safari browser provides WebStorage API to operate Cookies. You can use this API to manipulate Cookies in JavaScript.

The following is a specific code example for setting and obtaining Cookies:

Set Cookies:

localStorage.setItem("example_cookie", "example_value");

Get Cookies:

let cookieValue = localStorage.getItem("example_cookie");
console.log('Cookie value:', cookieValue);

4. Edge Browser

The cookie storage location in the Edge browser is also in the user data directory of the system.

In Windows, Edge's cookie storage location is: C:UsersUserNameAppDataLocalPackagesMicrosoft.MicrosoftEdge_8wekyb3d8bbweACMicrosoftEdgeCookiesCookies.

Edge browser provides a global chrome.cookies API to operate cookies, which can be used in extensions This API is used to manipulate cookies.

The following is a specific code example for setting and getting Cookies:

Set Cookies:

chrome.cookies.set({
    'url': 'http://www.example.com',
    'name': 'example_cookie',
    'value': 'example_value'
}, function(cookie) {
    console.log('Cookie set:', cookie);
});

Get Cookies:

chrome.cookies.get({
    'url': 'http://www.example.com',
    'name': 'example_cookie'
}, function(cookie) {
    console.log('Cookie value:', cookie.value);
});

Summary:

Different browsers differ in how they store and operate cookies. This needs to be taken into consideration when developing web applications in order to make full use of the APIs provided by different browsers and ensure that the application can run well across platforms. . In this article, we introduce you to the four most common browsers, namely Chrome, Firefox, Safari and Edge, and provide specific code examples for operating cookies, hoping to help you with your development work.

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