The screenshots below were taken on a PC running Windows 7, but the same steps work in Windows 10 and OS X.
- Click on the Menu icon in the top right corner.
- Select History.
- Select Clear Recent History.
- Click Last Hour.
- Select Everything. Select a different option if you don’t want to erase every site you’ve visited.
- Click Clear Now. You can uncheck other boxes if you don’t want to erase all of your history, because deleting cache and cookies will require you to re-login to sites. Your internet history in Firefox has been erased.
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