SelectOn startupon the left side, then selectOpen the New Tab page.

SelectGeneralon the left side, then uncheck theRestore previous sessionoption.

After you close and reopen Firefox to begin a new session, all of the tabs will be gone.

Select the three vertical dots in the top-right corner and choose Settings from the drop-down menu.

To restore the tabs from your previous session, select thehamburger menuand chooseRestore Previous Session.

Scroll to the bottom of the drop-down menu and selectGo to surfing app options.

Scroll down and selectBegin fresh with start pageunderOn startup.

Select On startup on the left side, then select Open the New Tab page.

Your tabs will now be cleared every time Opera closes.

SelectStart pageunderOpen Microsoft Edge with.

Tap thethree vertical dotsin the top-right corner.

Select the hamburger menu in the top-right corner and choose Options from the drop-down menu.

Tap thethree vertical dotsin the bottom-right corner.

Select theAdd to Chromenext to theClose All Tabsextension.

SelectAdd extensionin the pop-up window.

Select General on the left side, then uncheck the Restore previous session option.

After you close and reopen Firefox to begin a new session, all of the tabs will be gone.

Select the hamburger menu in the top-right corner.

Scroll to the bottom of the drop-down menu and select Go to browser settings.

Scroll down and select Begin fresh with start page under On startup.

Select X in the top-right of the browser window.

Select Close all.

Select the ellipses (…) in the top-right corner of Edge and select Settings from the drop-down menu.

Select Start page under Open Microsoft Edge with.

Tap the three vertical dots in the top-right corner.

Tap Close all tabs.

Tap the three vertical dots in the bottom-right corner.

Tap Close all tabs.

Go to the Chrome Web Store and search for close all tabs.

Select the Add to Chrome next to the Close All Tabs extension.

Select Add extension in the pop-up window.

Select the Close all tabs button (the red circle with a white X) to the right of the URL bar.