PUM.Optional.FireFoxSearchOverride

Short bio

This is the detection of several potentially unwanted modifications (PUMs) on user.js, a Firefox browser configuration file, where the installation of any third-party add-on or extension to Firefox is allowed.

System modifications

The following string is modified in user.js:

From:
user_pref("extensions.autoDisableScopes", 15);

To:
user_pref("extensions.autoDisableScopes", 14);
or
user_pref("extensions.autoDisableScopes", 0);

Remediation

Malwarebytes automatically deletes the user.js file that triggers the detection of PUM.Optional.FireFoxSearchOverride.