File System Access

This extension brings the File System Access API to Firefox that helps web apps such as https://vscode.dev read and write local files and folders.

Main features:

• Implemented showOpenFilePicker, showDirectoryPicker, showSaveFilePicker functions and related interfaces.
• Set to enable specific File System Access features on matching web pages.
• Provides File System Access API for other compatible WebExtensions.

Notes:

• The local file operations required by this extension cannot be performed in the browser, and a helper app needs to be installed to assist in the related work.
• The optional Code Editor feature is provided by the Code Editor extension.

Limitations:

• By default, FileSystemHandle will lose its instance methods after cloning (e.g. using IndexedDB or postMessage), and requires additional configuration of the FS_CONFIG.CLONE_ENABLED. Web developers can use FILE_SYSTEM_TOOLS.parseHandle(handle) to restore the instance methods.
• Limited Worker context support and requires additional configuration of the FS_CONFIG.WORKER_ENABLED.
• Read file size is limited by the FS_CONFIG.FILE_SIZE_LIMIT. Web developers can read large file streams and slices with handle.getFile({ _allowNonNative: true }), and write large file in-place with handle.createWritable({ _inPlace: true, keepExistingData: true }).