Error: Invalid call to browser.storage.local.set(). Disk I/O error.

Question

Created Dec ’25

Replies 5

Boosts 1

Views 1.1k

Participants 3

Hi, after upgrading MacOS (MB Air M1 Version 26.2 (25C56)) & Safari (Version 26.2 (21623.1.14.11.9)) to latest versions, we are experiencing a new bug occurring with our web extension (Click & Read) on local storage writing and getting this error :

Invalid call to browser.storage.local.set(). Disk I/O error.

This doesn't happen on other browsers (chromium, Firefox).

export const setLocalStorage = async (value: object) => {
  try {
    await browser.storage.local.set(value);
  } catch (error) {
    console.error("[Click & Read] Error setting local storage", error);
  }
};

Screenshot 2025-12-18 at 10.57.14.png

Boost

Answer 1

sanchezis OP

Jan ’26

I have the same error when using browser.storage.local.set() in my safari web extension. Have you found a fix/workaround?

0

Answer 2

habsaoui OP

6d

Well, after having upgraded macOS and Safari to latest versions, and tested again our extension from the AppStore, I still have this problem :-/

Screenshot 2026-02-05 at 17.57.43.png

0

Answer 3

habsaoui OP

6d

I don't understand, If I disable and enable the add-on, it's working back and no more errors...

Screenshot 2026-02-05 at 18.08.37.png

0

Answer 4

DTS Engineer OP

Apple

6d

Our engineering teams need to investigate this issue, as resolution may involve changes to Apple's software. Please file a bug report, include a small Xcode project and some directions that can be used to reproduce the problem, and post the Feedback number here once you do. I'll check the status next time I do a sweep of forums posts where I've suggested bug reports and post any information about changes I am able to share to this thread.

Bug Reporting: How and Why? has tips on creating your bug report.

1

Answer 5

habsaoui OP

1d

BTW, questions about Safari web addon local storage:

when a the addon is uninstalled, does its "browser.local.storage" get cleaned or remains (It is cleaned on Chrome/Firefox) ?
It seems the safari web inspector doesn't show the local storage content in Storage tab (readable only with command in console). Must we activate it somehow ?

0