Flotsam (auto-close tabs after specified time unless anchored)

Tabs accumulate. What starts as a quick lookup turns into dozens of stale pages silently consuming memory and attention. Flotsam flips the default: tabs are temporary unless you decide otherwise. The ones you care about get anchored; the rest drift away on their own.

After you install, each tab on a domain Flotsam manages (ordinary HTTP and HTTPS addresses) gets a countdown. When the countdown finishes, that tab closes automatically.

Click the toolbar icon to anchor the current tab so it stays open until you unanchor it. Click again to unanchor; the countdown applies again from there.

The tab you are looking at won't be closed. When you switch to another one it will start a new countdown.

You can exclude entire domains so their tabs are never auto-closed. Add or remove exclusions here or right-click the extension icon and choose "Exclude tab domain". An exclusion for example.com also covers subdomains such as www.example.com.

Flotsam does not auto-close: