Don't Discard is a free Chrome add-on developed by Yuhsak Inoue. It aims to disable the automatic tab discarding feature in Chrome and allows users to configure specific URLs for which the feature should be turned off. By default, the add-on disables automatic discarding for all tabs, but users can customize the conditions using regular expressions on the option page.

It's important to note that the relevant tabs need to be reloaded for the changes to take effect. Once a tab has been affected by the add-on, it will not be discarded even if it no longer meets the configured conditions. If users want to turn on the feature again, they can manually configure it by visiting the browser's discarding setting page or by relaunching the browser to sync the actual tab's states against the configured conditions.