What is Prefs js in Firefox?

The prefs. js file is a legitimate system file that stores user preference settings that differ from the default values. Its predefined location is %APPDATA%\Roaming\Mozilla\Firefox\Profiles\ folder. However, some anti-malware detect prefs. js as a potentially unwanted program (PUP).

Where do I put user js in Firefox?

The optional user. js file belongs in the Profile folder which is located under Roaming. You can use Help > Troubleshooting Information within Firefox to get to the correct folder for the Profile being used — at Profile Folder and then use the Open Folder button in the UI list in the left column.

How do I fix Javascript error in Firefox?

Firefox Support Forum | Mozilla Support….All Replies (2)

1. In the address bar, type about:config and press Enter.
2. Click “I accept the risk!”
3. In the search bar, search for “javascript. enabled” (with no quotes).
4. Right click the result named “javascript. enabled” and click “Toggle”. JavaScript is now disabled.

What is Mozilla CFG?

Firefox has the ability to customise installations using a configuration file called mozilla. cfg. This file sits in the Firefox install directory, and each time Firefox is loaded it’s checked for any custom configurations that have been added.

Where is Prefs js file located?

profile folder
The prefs. js file, located in the profile folder, is used by Firefox, Thunderbird, Mozilla Suite, SeaMonkey and other Mozilla-based applications to store settings.

How do I access Firefox cfg?

Opening about:config Type about:config in the address bar and press Enter. A warning page may appear. Click Accept the Risk and Continue to go to the about:config page. Click Show All to view all preferences currently set in the profile or use the Search preference name box to filter the list.

What is the Firefox user JS file for?

The Firefox user.js file stores user settings, the file is loaded each time Firefox starts. This a convenient way to save your browser customizations and apply them on different machines. The prefs.js file already exists in your Firefox profile directory, find the location using about:support in the top bar.

Is there a portable Prefs file for Firefox?

The prefs.js file already exists in your Firefox profile directory, find the location using about:support in the top bar. The prefs.js file looks like it could be portable, but it contains too many settings, including paths and system specific items. It would not work across different platforms or users.

What is prefsjs file?

It is a JScript Script file. thank you Please mark “Solved” the answer that really solve the problem, to help others with a similar problem. The file prefs.js is in your Profile folder. The location of the Profile folder is in a location hidden by Windows by default, as are many Windows folders.

What is a useruser JS file?

user.js is a file in the profile folder. The file name is incorrectly capitalized in the title of this article due to technical limitations in the software which powers the Knowledge Base. A user.js file is an alternative method of modifying preferences, recommended for advanced users only.