ブックマーク自動保存 is a Chrome extension that automatically bookmarks all open tabs at regular intervals. It creates a folder called "自動タブ保存" (Auto Tab Save) under the bookmark bar and saves the open windows and tabs every hour for up to 100 items and every day without any limit.

This extension was created to address situations where Chrome's built-in feature to restore tabs after a crash was not effective. While it may not be able to save tabs that were open right before a crash, it can save tabs that have been left open for a long time.

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Overall, ブックマーク自動保存 is a useful Chrome extension for automatically bookmarking all open tabs. It provides a convenient way to save tabs that have been left open for a long time, ensuring that they are not lost in the event of a crash. The extension creates a dedicated folder under the bookmark bar and saves the tabs at regular intervals, allowing users to easily access and organize their saved tabs.

The availability of the extension's source code on GitHub adds transparency and allows users to contribute to its development if desired. The developer's presence on Twitter provides a direct channel for communication and support.

If you are looking for a reliable way to automatically save and organize your open tabs in Chrome, ブックマーク自動保存 is a recommended extension to try.