File System Access API
- UNOFFAPI for manipulating files in the device's local file system (not in a sandbox).
IE
- 5.5 - 10: Not supported
- 11: Not supported
Edge
- 12 - 18: Not supported
- 79 - 85: Disabled by default
- 86 - 102: Partial support
- 103: Partial support
Firefox
- 2 - 101: Not supported
- 102: Not supported
- 103 - 104: Not supported
Chrome
- 4 - 73: Not supported
- 74 - 85: Disabled by default
- 86 - 102: Partial support
- 103: Partial support
- 104 - 106: Partial support
Safari
- 3.1 - 15.1: Not supported
- 15.2 - 15.4: Partial support
- 15.5: Partial support
- 16.0 - TP: Partial support
Opera
- 9 - 60: Not supported
- 62 - 71: Disabled by default
- 72 - 85: Partial support
- 86: Partial support
- 87: Partial support
Safari on iOS
- 3.2 - 15.1: Not supported
- 15.2 - 15.4: Partial support
- 15.5: Partial support
- 16.0: Partial support
Opera Mini
- all: Not supported
Android Browser
- 2.1 - 4.4.4: Not supported
- 103: Not supported
Opera Mobile
- 10 - 12.1: Not supported
- 64: Not supported
Chrome for Android
- 103: Not supported
Firefox for Android
- 101: Not supported
UC Browser for Android
- 12.12: Not supported
Samsung Internet
- 4 - 16.0: Not supported
- 17.0: Not supported
QQ Browser
- 10.4: Not supported
Baidu Browser
- 7.12: Not supported
KaiOS Browser
- 2.5: Not supported