Firefox 48 crashes at startup if websense is installed. Right now, they aren't sure how to fix it. The hotfix was deployed to people using Firefox 47 and lower (down to 40) to detect if websense is installed, and if so, not update Firefox yet.

I wouldn't remove it.

Have you got some crash IDs please.

We're sorry to hear that Firefox is crashing. In order to assist you better, please follow the steps below to provide us crash IDs to help us learn more about your crash.

The crash report is several pages of data. We need the report numbers to see the whole report.

1. Enter about:crashes in the Firefox address bar and press Enter. A Submitted Crash Reports list will appear, similar to the one shown below.
2. Copy the 5 most recent Report IDs that start with bp- and then go back to your forum question and paste those IDs into the "Post a Reply" box.

Note: If a recent Report ID does not start with bp- click on it to submit the report.

(Please don't take a screenshot of your crashes, just copy and paste the IDs. The below image is just an example of what your Firefox screen should look like.)

Thank you for your help!

More information and further troubleshooting steps can be found in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

Thanks, no crash reports are listed. Firefox just locked up my notebook. Maybe a coincidence? It started fine. Then locked up (perhaps it was installing that hot fix?) Might be on my side and not an issue with Firefox. So, I suppose I need to keep that hotfix even though Websense is not installed & no Qipcap.dll or Qipcap.64 are anywhere to be found on my hard drive. I have Version 48.0.2 installed at this time.