Sessionry saves your browser windows and tabs within seconds of every change, as a version you can go back to. After a crash or restart, one click restores every window with pinned tabs and tab groups, and background tabs stay unloaded until clicked so big restores do not freeze your computer. The free tier includes 3 days of versioned history, up to 5 collections, search, duplicate-tab cleanup and import and export. No account and no network requests. Available now on Microsoft Edge Add-ons, with the Chrome listing coming soon. A Pro tier is planned.
Your browser crashed, an update restarted it, or you closed the wrong window, and the tabs didn't come back. Sessionry saves your windows and tabs within seconds of every change so you can go back to a version.