False Positive or Exploit?

[Combiner]

Today when I started Firefox Developer Edition, it closed and MB popped up with this in the logs:

 

Malwarebytes
www.malwarebytes.com

-Log Details-
Protection Event Date: 11/7/17
Protection Event Time: 6:37 PM
Log File: d2602d10-c42d-11e7-b8cf-4ccc6a4da6f0.json
Administrator: Yes

-Software Information-
Version: 3.2.2.2018
Components Version: 1.0.212
Update Package Version: 1.0.3202
License: Premium

-System Information-
OS: Windows 10 (Build 14393.1593)
CPU: x64
File System: NTFS
User: System

-Exploit Details-
File: 0
(No malicious items detected)

Exploit: 1
Malware.Exploit.Agent.Generic, , Blocked, [0], [392684],0.0.0

-Exploit Data-
Affected Application: Mozilla Firefox (and add-ons)

File Name: 
URL: 

(end)

 

 

Is this a false positive? Or should I be worried?