One the latest Firefox features lets you reopen and restore recently and accidentally closed tabs on the toolbar. This may be especially useful in case of a crash of your browser or simply because you had to turn off Firefox in a hurry. Whatever the reason, such a great feature has got a big limitation. In fact, Firefox won’t restore more than a certain number of tabs. The reason behind this apparent senseless decision is due to the fact that if you have a lot of opened tabs, Firefox could crash or require your Windows operating system a lot of resources to reopen them. Basically, there is a security issue behind this limitation. However, if you wish to increase the number of these closed tabs, I have got the right trick for you!
- Open your Firefox.
- In the URL field, type about:config and press Enter.
- Click the “I’ll be careful. I promise!” button.
- In the Filter field, type browser.sessionstore.max_tabs_undo and hit Enter.
- The requested key will appear on the main pane. As you see, under value, the default number is seto to 10 (ten). This means that in case you want to restore any recently closed tabs, Firefox will open ten on them. The rest will be lost.
- Double click the value and change the number to whatever value you wish.
- Click OK.
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