Youtube Time Keeper is a simple Chrome extension developed by daffy1234 that aims to solve the problem of losing your progress in Youtube videos when your browser crashes or restarts. This free extension keeps track of the current time of Youtube videos and updates the URL in the address bar every second to include "t=[current time]". This ensures that videos resume where they left off even if Chrome is closed accidentally or if a tab is suspended using another extension like "The Great Suspender".

The extension also comes with some additional features and fixes. With version, an issue causing the tab icon to blink and potentially cause a memory leak has been fixed. Versionbrings minor changes, along with the addition of an icon and a screenshot. In version, the hourglass button now turns red when the timer is disabled, and the URL is updated to display the time in a more readable format (e.g., "t=3m21s" instead of "t=201") for times over a minute.

Although Youtube Time Keeper does its job effectively, there is a known issue with the hourglass button looking broken in full screen mode. Additionally, versionaddresses cases where the button may not appear until after the page fully loads. Lastly, versionintroduces a button on Youtube videos to disable the timer, which can be useful when sharing videos from the beginning. Overall, Youtube Time Keeper is a useful tool for anyone who wants to retain their progress in Youtube videos, even in the event of browser crashes or restarts.