Trailless

Forget sites when you leave: clears a site’s cookies and site data after its last tab closes. Keep list for logins.

Close the last tab of a site, and a few seconds later Trailless deletes that site’s cookies and site data. Sites you want to stay signed in to go on your keep list with one click. Everything happens in your browser: no account, no server, no network requests at all. How it works 1. On first start, Trailless lists the sites you have open and suggests keeping them all, so you are not signed out of anything. Uncheck the ones you want cleaned. Nothing is deleted before you finish this step. 2. Browse as usual. When no tab shows a site any more, Trailless waits (15 seconds by default) and then cleans it. Open the site again in time and nothing happens. 3. Want to stay signed in somewhere? Click the toolbar button and press Keep this site. What you get - Automatic cleaning when you leave a site: after closing its last tab or navigating away. - Keep list with one-click keep, plus "Keep" next to every site that is waiting to be cleaned, in case you closed something by mistake. - Adjustable waiting time: 5 seconds to 1 hour. - Clean now for the site you are on. - Optional: clean every site that is neither kept nor open when the browser starts (also clears data from before you installed Trailless). Cookies of kept sites are spared (one exception under Honest limits); their other site data only for the main and www address and the addresses you have had open in a tab. - Sites still open when you close the browser are cleaned shortly after the next start, unless their tabs come back. - A local log of what was cleaned (site name and time only, last 200). - Badge with the number of sites waiting. English and Turkish, light and dark theme, keyboard and screen-reader friendly. What it cleans, exactly The site’s cookies for the whole site (all subdomains, http and https), and for every address of the site you had open in a tab: local storage, IndexedDB, cache storage, service workers and file system data. Storage that embedded sites keep only for this site (partitioned storage, such as local storage in an embedded frame) is cleared with it. Honest limits - It does not clean your history, the browser’s HTTP cache, downloads, saved passwords or form data. - Third-party cookies that embedded sites (ads, video players, sign-in buttons) set under their own name are not cleared with the site you were on; they are cleaned only if you also had that site open in a tab. - With the browser-start option, other site data of a kept site (not its cookies) is spared only for the addresses Trailless knows: a separate sign-in subdomain or another port you never opened can lose it. - With the browser-start option, an address you typed into the keep list is protected only if you have opened it in a tab when its ending is not on Trailless's short built-in list (for example foo.co.id or foo.github.io); otherwise its cookies can be deleted too. To protect such a site, open it in a tab and press Keep this site. - Sites you visited before installing are cleaned after you open and close them again, or with the browser-start option. - Incognito windows are left alone: the browser already deletes their data when you close them. - Pages already open keep what they have in memory until you reload them. Why the "Read your browsing history" warning? Chrome only tells an extension which site a tab shows if it has the tabs permission (or access to every website, which would be a much broader warning). Trailless needs that to know when a site’s last tab is gone. It keeps only site names and origins (like https://www.example.com), never paths, titles or page content, and it never sends anything anywhere. Deleting site data uses the browsingData permission. Requires Chrome 116 or newer.