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When troubleshooting Firefox problems, resetting user preferences can be helpful in pinpointing the issue. This article explains how to do it.

{for not fx13} When [[Basic Troubleshooting|troubleshooting Firefox problems]], resetting preferences (zoom, tabs, privacy, network, encryption, download actions, etc.) is one of many procedures that can be helpful in pinpointing the issue. This article explains how to use [[Troubleshoot Firefox issues using Safe Mode|Safe Mode]] to reset preferences. *If changes to preference settings are not saved when you restart Firefox, see [[Preferences are not saved]]. To reset preferences: [[T:safemode]] # Click to put a check mark by '''Reset all user preferences to Firefox defaults'''. {for win}<br/> <br/> [[Image:89a0533be70261469542ad18a5b0fa00-1259976432-945-1.png]] <br/> {/for}{for mac}<br/> <br/> [[Image:89a0533be70261469542ad18a5b0fa00-1256947708-467-1.png]] <br/>{/for} # To apply your changes, click {button Make Changes and Restart}. Firefox will restart with your preference settings changed back to the defaults. {/for} {for fx13} Resetting preferences (zoom, tabs, privacy, network, encryption, download actions, etc.) is one of many procedures that can be helpful in fixing Firefox issues. There are two ways to do this - reset Firefox to it's default state or delete the preference files. We'll explain both methods. *If changes to preference settings are not saved when you restart Firefox, see [[Preferences are not saved]]. __TOC__ =Solution 1: Reset Firefox to it's default state= [[Template:resetnote]] [[Template:resetsteps]] {/for} =Solution 2: Delete Firefox preference files= {for =fx13,=fx14} [[T:safemode]] # Click to put a check mark by '''Reset all user preferences to Firefox defaults'''. {for win}<br/> <br/> [[Image:89a0533be70261469542ad18a5b0fa00-1259976432-945-1.png]] <br/> {/for}{for mac}<br/> <br/> [[Image:89a0533be70261469542ad18a5b0fa00-1256947708-467-1.png]] <br/>{/for} # To apply your changes, click {button Make Changes and Restart}. Firefox will restart with your preference settings changed back to the defaults. {/for} {for fx15} #[[Template:OpenProfileFolder]] #[[Template:closeFirefox]] #Locate and delete the {filepath prefs.js} file. If you find more than one, a {filepath prefs.js.moztmp} file or a {filepath user.js} file, delete these as well. #You can close the profile folder and open Firefox now. {/for} [[Template:ShareArticle|link=http://mzl.la/MLVHSq]]