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File System Access API Browser Compatibility On Opera

Create and modify files in the device's local file system. This API also allows reading, writing and modifying permissions of files.

Last updated on : 2026-02-09

Support for File System Access API on all Opera versions

Here’s the support for File System Access API across all versions of Opera:

 OperaOpera versions: 125-112
Fully Supported
 OperaOpera versions: 111-72
Partially supported
 OperaOpera versions: 71-9.5
Not supported

Why Test on Opera?

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

TOP Opera BROWSERS

Browser Version

% Share

Release Date

Opera 124

0.58

2024-05-14

Opera 93

0.39

2021-09-14

Opera 96.1

0.23

2026-01-11

Opera 125

0.2

2024-06-12

Opera 92

0.05

2021-08-03

Opera Mini 4.4

0.04

2026-01-11

Other

1.62

-

Data Source: Statcounter.com

ALL DESKTOP BROWSERS

Browsers

% Share

Chrome

75.45

Edge

9.55

Safari

5.37

Firefox

4.32

Opera

2.13

Brave

1.17

Other

2.02

Data Source: Statcounter.com

Browser Versions

IEIE

EdgeEdge

FirefoxFirefox

ChromeChrome

SafariSafari

OperaOpera

5.5 - 11
Test on IE 5.5 - 11 ...
12 - 85
Test on Edge 12 - 85 ...
86 - 127
Test on Edge 86 - 127 ...
128 - 144
Test on Edge 128 - 144 ...
2 - 150
Test on Firefox 2 - 150 ...
113 - 132
Test on Firefox 113 - 132 ...
4 - 85
Test on Chrome 4 - 85 ...
86 - 130
Test on Chrome 86 - 130 ...
131 - 147
Test on Chrome 131 - 147 ...
3.2 - 26.3
Test on Safari 3.2 - 26.3 ...
15.2 - 18
Test on Safari 15.2 - 18 ...
9.5 - 71
Test on Opera 9.5 - 71 ...
72 - 111
Test on Opera 72 - 111 ...
112 - 125
Test on Opera 112 - 125 ...

...Fully Supported

...Partially

...No Support

About Opera

The Opera browser was originally released in 1996 by the Opera Software company. It has remained a popular web browser for many years and is still actively developed today. In 2013, it announced that it would switch from its proprietary Presto engine to the open-source Chromium project.

Opera features a built-in screenshot tool; this is just one of the many features Opera has adopted from other web browsers, including Speed Dial, pop-up blocking, re-opening recently closed pages, private browsing, and tabbed browsing. Opera is a Web browser that is smaller in size, faster and more stable than Mozilla or Microsoft browsers.

Opera has released a new cryptocurrency wallet for Android phones. The app, available on the beta and developer versions of Opera for Android, supports Web 3, which is specifically for mobile payments and cryptocurrency payments. The wallet is highly secure, and funds are stored with full control from the user. There is no need to enter a PIN code or password, as the user's smartphone will act as their way to unlock the wallet.

Opera lets you easily chat through Facebook Messenger, VKontakte and WhatsApp from your PC, including muting your notifications and tracking them on your phone.

Download Opera

To Download Opera browser’s latest version, visit the official Opera website.

 Opera

Latest Opera version: 125

Fully Supported

File System Access API is Fully Supported in Opera. To ensure it works seamlessly on your website or web app, test your site’s URL on Opera using TestMu AI.


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