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Fix slowness, crashing, unwanted toolbars, search hijacking and more by restoring Firefox to default settings. We'll save your bookmarks, tabs and passwords.

If you're having problems with Firefox, resetting it can help. The reset feature fixes many issues by restoring Firefox to its factory default state while saving your essential information like bookmarks and open tabs. __TOC__ =Reset Firefox to its default state= [[T:resetsteps]] =What does the reset feature do?= All of your Firefox settings and personal information are stored in a [[Profiles - Where Firefox stores your bookmarks, passwords and other user data|profile folder]]. The reset feature works by creating a new profile folder for you while saving your important data. '''Firefox will save these things:''' {for not fx23} *Bookmarks *Browsing history *Passwords *Cookies *Web form auto-fill information {/for} {for =fx23,=fx24} *Bookmarks *Browsing history *Passwords *Cookies *Web form auto-fill information *Personal dictionary {/for} {for fx25} *Bookmarks *Browsing history *Passwords *Open windows, tabs and tab groups *Cookies *Web form auto-fill information *Personal dictionary {/for} '''These items and settings will be removed''': {for not fx18} *Open tabs, windows, tab groups, [[Find and install add-ons to add features to Firefox|extensions and themes]], website-specific preferences, personal dictionary, [[Search bar - Easily choose your favorite search engine#w_adding-search-engines|search engines]], [[Find and manage downloaded files|download history]], DOM storage, [[Advanced settings for accessibility, browsing, system defaults, network, updates, and encryption#w_certificates-tab|security settings]], [[Change what Firefox does when you click on or download a file|download actions]], [[Set how Firefox handles different types of files|plugin settings]], [[Customize Firefox controls, buttons and toolbars|toolbar customizations]], and user styles will be removed. {/for} {for =fx18,=fx19,=fx20} *Open tabs, windows, tab groups, [[Find and install add-ons to add features to Firefox|extensions and themes]], website-specific preferences, personal dictionary, [[Search bar - Easily choose your favorite search engine#w_adding-search-engines|search engines]], [[Find and manage downloaded files|download history]], DOM storage, [[Advanced settings for accessibility, browsing, system defaults, network, updates, and encryption#w_certificates-tab|security settings]], [[Change what Firefox does when you click on or download a file|download actions]], [[Set how Firefox handles different types of files|plugin settings]], [[Customize Firefox controls, buttons and toolbars|toolbar customizations]], user styles and [[How does Facebook Messenger for Firefox work?|Facebook Messenger for Firefox]] will be removed. {/for} {for =fx21,=fx22} *Open tabs, windows, tab groups, [[Find and install add-ons to add features to Firefox|extensions and themes]], website-specific preferences, personal dictionary, [[Search bar - Easily choose your favorite search engine#w_adding-search-engines|search engines]], [[Find and manage downloaded files|download history]], DOM storage, [[Advanced settings for accessibility, browsing, system defaults, network, updates, and encryption#w_certificates-tab|security settings]], [[Change what Firefox does when you click on or download a file|download actions]], [[Set how Firefox handles different types of files|plugin settings]], [[Customize Firefox controls, buttons and toolbars|toolbar customizations]], user styles and [[Use Firefox Services to add social features to your browser|social features]] will be removed. {/for} {for =fx23,=fx24} *Open tabs, windows, tab groups, [[Find and install add-ons to add features to Firefox|extensions and themes]], website-specific preferences, [[Search bar - Easily choose your favorite search engine#w_adding-search-engines|search engines]], [[Find and manage downloaded files|download history]], DOM storage, [[Advanced settings for accessibility, browsing, system defaults, network, updates, and encryption#w_certificates-tab|security settings]], [[Change what Firefox does when you click on or download a file|download actions]], [[Set how Firefox handles different types of files|plugin settings]], [[Customize Firefox controls, buttons and toolbars|toolbar customizations]], user styles and [[Use Firefox Services to add social features to your browser|social features]] will be removed. {/for} {for fx25} *[[Find and install add-ons to add features to Firefox|Extensions and themes]], website-specific preferences, [[Search bar - Easily choose your favorite search engine#w_adding-search-engines|search engines]], [[Find and manage downloaded files|download history]], DOM storage, [[Advanced settings for accessibility, browsing, system defaults, network, updates, and encryption#w_certificates-tab|security settings]], [[Change what Firefox does when you click on or download a file|download actions]], [[Set how Firefox handles different types of files|plugin settings]], [[Customize Firefox controls, buttons and toolbars|toolbar customizations]], user styles and [[Use Firefox Services to add social features to your browser|social features]] will be removed. {/for} {note}'''Note:''' Your old Firefox profile will be placed on your desktop in a folder named "Old Firefox Data." If the reset didn't fix your problem you can restore some of the information not saved by [[Recovering important data from an old profile#w_copying-files-between-profile-folders|copying files to the new profile that was created]]. If you don't need this folder any longer, you should delete it as it contains sensitive information.{/note} [[Template:ShareArticle|link=http://mzl.la/MnSTZB]]