Is Internet Explorer currently the default Web browser on your Windows 7 computer? Learn how to change the default browser setting and use something different, like Firefox or Chrome. You should now be able to access the Print Preview menu in Firefox. Step 5: Right-click the print_printer option, then click the Reset button. This is different from the address bar that you typed into in Step 2. Step 4: Type print_printer into the Search bar near the top of the menu. Step 3: Click the blue I’ll be careful, I promise! button to confirm that you accept the risks with adjusting settings on this menu. Step 2: Click inside the address bar at the top of the window, type about:config and press Enter on your keyboard. For example, if you are having problems entering Print Preview (such as if you want to access the Page Setup menu to change your header or footer) and are getting an error message, then this might be able to help. The steps below will show you how to reset your current Firefox print settings. Resetting the Firefox Print Settings to Their Default The Firefox print preview error can also be caused by incorrect scaling of the page. Missing configuration files necessary to run the extensions can cause a host of errors, and this error is no exception. Fortunately it is possible to reset Firefox’ printer settings by following the guide below. The most common reason that you may be facing this error is broken or corrupt extensions. It was possible to print pages from the browser, but I was seeing errors if I tried to open Print Preview, or change some print settings. One problem I encountered involved Firefox. These are most commonly seen as general issues where the printer needs to be completely reinstalled, or a driver needs to be updated, but they can also extend into specific programs. Windows 10 updates have been happening a lot more frequently of late (whether they are intentional or not) and one issue that I have been noticing is an increase in printer problems.