Bug: unable to save layout in Brave

[delasource]

Clicking "Save" does nothing at my side. It shows in console log "User cancelled save file request" but i didnt.
Using Brave, tried with all blockers disabled.
Using Edge or Chrome, it is working.

[bboc]

Same issue here, tested on Brave version 1.65.130 on MacOs Sonoma, with a new profile, default settings, no extensions, and all shields disabled. Load button appears to work,though, clicking it displays a dialog for selecting a file.

[potter-man]

Somehow there is no Window::showSaveFilePicker function in Brave
Issue: brave/brave-browser#29411

It enables with flag File System Access API mentioned in the comment brave/brave-browser#29411 (comment)

[bboc]

@potter-man Thanks. I can confirm that enabling the flag opens the download dialog.

I guess we can't expect all Brave users to enable that flag, so the simplest fix I can imagine is testing for Window::showSaveFilePicker, and if that does not exist, simply trigger a download with a default filename.