Hello, this is my first post/topic in here, please let me know if I've done something incorrectly.
I use Firefox, and recently when I did a scan with AdwCleaner v6.030 it showed me my prefs.js file located here:
This file, even when I do a clean with Adwcleaner or remove it manually by deleting it myself keeps showing up, probably the next time I close and start firefox. I've even refreshed firefox, uninstalled and reinstalled, but the file still keeps being remade. Could it be a false positive? I've always trusted Adwcleaner and hadn't had problems with it before.
I get the suspicion that it might be made by one of the addons I have and the prefs.js file could be practically harmless, but of course if it's really a virus I'd like to know what else I can do to remove it permanently since it keeps being recreated. I think last time I deleted it manually it deleted my firefox appearance and minor settings like the positions of the firefox buttons I have re positioned with Firefox's customize tool (another reason it makes me think it could be a false positive) and stuff like that. Any ideas? I have the latest firefox version (49.0.2). The addons I currently have are Blur, UBlock Origin, x-kit and NoScript. I haven't touched the Plugins since reinstalling firefox and they are OpenH264, Primetime Content Decryption Module, Shockwave Flash, Widevine Content Decryption Module, and Silverlight Plug-in. Should any of those be set to 'never activate' for extra security? Anything else I should have for extra security? I do also do regular scans with Malware bytes (free version) and MCE.
Thank you for your help.
Edited by katerinafm, 10 November 2016 - 07:17 PM.