Over time, Firefox may experience issues such as slowness, crashes, unwanted panels tools and more. Finding the causes and solving these problems can be complex, time consuming and time consuming. The Reset Firefox feature can solve many problems by resetting Firefox settings to their default settings while keeping the information that is important to you safe.
What does the reset function do?
All of your personal data and Firefox settings are stored in your profile folder. The reset feature works by creating a new profile folder for you and saving the most important data for you:
Firefox will try to save the following data:
Bookmarks
History of web surfing
Passwords
Cookies
Information for autofilling web forms
Personal dictionary
The following features and options will be restored to default or removed:
Extensions and Themes: Although they can be very useful, some extensions and themes can cause problems. If you need to reinstall important extensions, see Customize Firefox with add-ons.
Open tabs, windows, and tab groups: The reset process will close all open websites. Since your bookmarks and browsing history will be saved, you can easily return to your favorite sites. For getting additional information read the articles Where can I find my bookmarks? and Autocomplete address bar. Also, since your cookies will be saved, you will not be logged out from the websites you were logged into prior to the reset.
Website customization, search engines, personal spelling dictionary, download history, DOM storage, security certificate settings, security device settings, load actions, plugin MIME types, panel settings, and custom styles will also not be saved. For more information about them, see Profiles - Where Firefox stores your bookmarks, passwords, and other user data.
Note: After the reset process is complete, the information from your old Firefox profile will be placed on your desktop in a folder called "Old Firefox Data". If the reset did not fix your problem, you can recover some of the unsaved information by copying the files to the newly created profile. For instructions, see Copy files between profile folders. If you no longer need this folder, you should delete it because it contains sensitive information.
How to reset Firefox settings to default?
1. At the top of the Firefox window, click on the "Firefox" button, go to the "Help" submenu and select "Troubleshooting Information".
2. Click the "Reset Firefox" button in the upper right corner of the Troubleshooting Information page.
3. To continue, in the confirmation window that opens, click on the "Reset Firefox" button.
4. Firefox will close and reset. When the reset is completed, the window that appears will list the imported information. Click on the "Finish" button and Firefox will be opened.
Many users have Mozilla Firefox over time, a rather large history of visits to various sites accumulates, respectively, a cache, which in turn worsens the performance of the browser. Therefore, many are thinking about how to get rid of it all. Let's elaborate on this issue.
How to clear the cache in Firefox
The Firefox cache is located in the following location - C:\Users\Your Username\AppData\Roaming\Mozilla\Firefox\Profiles\Your Profile\Cache
In order to clean it, you need to perform a few simple manipulations. Consider the case of Windows 7. In the new Firefox, the interface has changed a bit, so that the settings menu can be reached in several ways:
- Press the Alt key, after which you will have tabs at the top of the browser, that's where we look for the right one - "Tools" and select the "Settings" item in it
- In the upper right corner, click on the button context menu(a button in the form of three horizontal stripes) and then click on the "Settings" gear.
After you do this, a window with browser settings will open in front of you.
The only thing left is the small thing, in the window that opens, go to the “Additional” item, then select the “Network” tab and here click the “Clear Now” button.
That's it, clear cache Mozilla browser Firefox is complete.
Sometimes it is simply too lazy to clear the cache in Firefox, for this you can set it to automatically delete it.
Auto clear cache in Firefox
In the same settings window, go to the “Privacy” item, in the drop-down list, select “will use your history storage settings”. After selecting this item, you will have additional settings. Check the "Clear history when Firefox closes" checkbox.
After that, the "Options" button will become active, click it.
In this window, you should only check the "Cache" item and click "OK". Everything, automatic deletion of the cache is configured.
Interesting!
In order to see what's in this moment is in the cache of your firefox, it is enough to write the following in the address bar - about:cache.
Reset Mozilla settings Firefox eliminates errors that have arisen in the browser. There are two ways to perform a factory reset: by clearing Firefox using the special button on the support page, or by deleting the file that stores the settings.
Browser cleaning
The easiest way to reset the Mozilla browser to its default settings is to use the reset button on the support page. Cleaning removes settings, extensions, and themes; bookmarks, saved passwords, cookies, open tabs, the autofill information for web forms across sites will remain intact.
Try restarting your browser safe mode, which disables all add-ons. If errors persist in safe mode, then go back to the support page and restore the settings that were set in Mozilla Firefox by default by clicking the "Clear" button. In the window that appears, confirm your intention by clicking "Clear Firefox".
After the reset, the "Old Data" directory will appear on the desktop, in which you will find the profile files.
If necessary, you can restore them by dropping them back into the web browser directory.
Deleting a settings file
If you have no complaints about the work of extensions, and you do not want to lose installed themes, then use another method to reset the parameters, which is to delete the configuration file.
To restore the default settings, locate and delete the prefs.js file in the user's directory. You can do without deleting: just rename the file, adding the word "old" to its extension - prefs.jsOLD. So you save it backup, which will make it possible, if necessary, to restore the settings lost after the reset. 
In the event that malfunction occurs during use Firefox browser, do not worry, as everything can be fixed very quickly. That is, to eliminate the failure and other problems, it is enough to perform a reset.
Performing a factory reset makes it possible to fix any problems with Mozilla, as well as remove extensions and add-ons that could act as a cause of failures. In this article, we will look at how to reset Mozilla to factory settings.
Reset information in Mozilla search engine
Resetting the Firefox search engine only removes add-ons and extensions. As for the cache, browsing history and tab bar, they will not be affected in any way. Restoring default data is possible in several ways:
First way
After that, the browser will be reset to basic settings.
Second way
- In the search engine in the upper right corner, activate the "Menu" button.
- And find the button that says "Shutdown".
- LMB click on it.
- On the keyboard, simultaneously press the Win + R keys.
- In the line of the appeared window "Run", enter the text "firefox.exe -P".
- Then a window with profiles should appear.
- In it, find the "Create" button and left-click on it.
- In the next act, the user can specify the name of the new profile, as well as change its location on the PC.
- Press "Finish".
- After that, a control window will pop up, in which you can switch from profile to profiles or uninstall them completely.
The last method allows you to easily restore the default Mozilla search engine data, however, it has a drawback that for some users will not be relevant. That is, in addition to returning the default search engine settings, all add-ons and extensions, as well as other data (browsing history, cookies, passwords, cache, etc.) will be deleted.
Cache - hide. It is a buffer for saving images, data from visited pages and sites, performs fast access to them. Reduces the amount of traffic, speeds up the loading of previously visited web pages. Cache - memory with the highest access speed than the storage of the original data.
All this information is stored on the user's device, and accumulated can significantly affect performance. It is recommended to clear the cache regularly.
Where is Firefox's cache located - for advanced users
The folder provides an opportunity to get information about previously visited sites, suppose this can be convenient when the Internet is turned off. Opening it is simple - enter the combination " about:cache?device=memory" (without quotes). Click here List Cache Entries- list of entries.
Now let's look at how to clear the cache of the Mozilla Firefox browser. It is quite simple to do this, as a result, the browser will work much faster. Let's get started:
Clear Firefox cache after exit
You can also configure the cache to be deleted after each exit from the program. For this:
- We go to " Settings" or copy it to the address bar - about:preferences#privacy.
- Select the item " privacy».
- « Story».
- Put a check mark next to " Clear history when Firefox closes”, next to the checkmark, press the button “ Options».
- Here we set the mark " Delete cache».
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