Check what's on the about:third-party page.

Please see below:

[rooksbas.dll File version 3.9.0.1 Vendor info IBM Occurrences 1 Avg. Blocking time (ms) 32.1338 mdnsNSP.dll File version 3.1.0.1 Vendor info Apple Inc. Occurrences 1 Avg. Blocking time (ms) -

 {
   "name": "rooksbas.dll",
   "fileVersion": "3.9.0.1",
   "typeFlags": 1,
   "signedBy": "IBM",
   "applicationName": "Trusteer Endpoint Protection",
   "applicationPublisher": "Trusteer",
   "events": [
     {
       "processType": "browser",
       "processID": 8516,
       "threadID": 4056,
       "loadStatus": 0,
       "loadDurationMS": 32.1338
     }
   ]
 },
 {
   "name": "mdnsNSP.dll",
   "fileVersion": "3.1.0.1",
   "typeFlags": 1,
   "signedBy": "Apple Inc.",
   "applicationName": "Bonjour",
   "applicationPublisher": "Apple Inc.",
   "events": [
     {
       "processType": "browser",
       "processID": 8516,
       "threadID": 7348,
       "loadStatus": 0,
       "loadDurationMS": 1.474
     }
   ]
 }

]

Note that this looks like an OOM (out of memory) issue. MOZ_CRASH Reason (Sanitized) : [unhandlable oom] Failed to allocate for GenericBuffer::put.

Thank you for your response. What causes OOM issues and how do I fix it?