On the Basic screen, in the On startup section, click the “Continue where I left off” option. To have Opera open the tabs from your last session, click the Opera menu in the upper-left corner of the browser window and select “Settings” from the drop-down menu. To close the Settings tab, click the “X” on the right side of the tab or press Ctrl+W on your keyboard. Click “OK”.Ĭhanges to settings are automatically saved. In the Startup section, select “Show my windows and tabs from last time” in the “When Firefox starts” drop-down list. Make sure the General screen is active on the Options tab. To automatically open all the windows and tabs that were open in your last Firefox browsing session, click the Firefox menu button (three horizontal bars) in the upper-right corner of the window and click “Options” on the drop-down menu. Firefox not only remembers what tabs were open in your last browsing session, but also all the windows that were open, if you had multiple Firefox windows open.