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Cookie Store API Browser Compatibility On Mozilla Firefox

The Cookie Store API is the modern alternative to reading and writing cookies in JavaScript. The API is available to service workers, which allows you to easily set a cookie on a client, read it back in the service worker, then later update it.

Last updated on : 2025-11-11

Support for Cookie Store API on all Firefox versions

Here’s the support for Cookie Store API across all versions of Firefox:

 FirefoxFirefox versions: 147-138
Fully Supported
 FirefoxFirefox versions: 137-2
Not supported

Why Test on Firefox?

To make a right testing strategy it's important to understand how many users are actually using the Firefox browser
To help you build the right browser testing matrix, here's the overall marketshare of both Firefox browser the various versions.

TOP Firefox BROWSERS

Browser Version

% Share

Release Date

Firefox 143

0.77

2025-09-16

Firefox 144

0.63

2025-10-14

Firefox 115

0.14

2023-07-04

Firefox 43

0.1

2015-12-15

Firefox 118

0.1

2023-09-26

Firefox 133

0.06

2024-11-26

Other

1.63

-

Data Source: Statcounter.com

ALL DESKTOP BROWSERS

Browsers

% Share

Chrome

78.23

Edge

8.65

Safari

4.61

Firefox

3.86

Opera

1.99

Brave

1.03

Other

1.64

Data Source: Statcounter.com

Browser Versions

IEIE

EdgeEdge

FirefoxFirefox

ChromeChrome

SafariSafari

OperaOpera

5.5 - 11
Test on IE 5.5 - 11 ...
12 - 86
Test on Edge 12 - 86 ...
87 - 142
Test on Edge 87 - 142 ...
2 - 137
Test on Firefox 2 - 137 ...
138 - 147
Test on Firefox 138 - 147 ...
4 - 86
Test on Chrome 4 - 86 ...
87 - 145
Test on Chrome 87 - 145 ...
3.2 - 18.4
Test on Safari 3.2 - 18.4 ...
18.5 - 26.2
Test on Safari 18.5 - 26.2 ...
9.5 - 73
Test on Opera 9.5 - 73 ...
74 - 122
Test on Opera 74 - 122 ...

...Fully Supported

...Partially

...No Support

About Mozilla Firefox

The Mozilla Corporation & its subsidiary, the Mozilla Corporation, developed Mozilla Firefox, or simply Firefox, a free and open-source web browser. Firefox displays web pages using the Gecko rendering engine, adhering to current and future web standards. It is a significant player in the market.

Mozilla Firefox was created in 2002 under the code name "Phoenix" by Mozilla community members who wanted more than a single program in their Mozilla Application Suite bundle. Firefox's beta version gained popularity with testers and was praised for its speed, security, and add-ons compared to Microsoft's then-dominant Internet Explorer 6.

In 2004, Mozilla released Firefox, challenging Internet Explorer's dominance. In nine months, Firefox had been downloaded more than 60 million times. Firefox is the successor of Netscape Navigator as it was created by Netscape in 1998 before its acquisition by AOL.

Firefox comes with a few useful features. For example, Firefox has tabbed browsing with individual processes per tab, a built-in pop-up blocker, private browsing, phishing detection, and a sandbox security model. One feature of Firefox that's vital to some users is that it works on multiple platforms.

Download Mozilla Firefox

Visit the official website of Mozilla Firefox to download the Firefox browser version.

 Firefox

Latest Firefox version: 147

Fully Supported

Cookie Store API is Fully Supported in Firefox. To ensure it works seamlessly on your website or web app, test your site’s URL on Firefox using LambdaTest.


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