We're sorry to hear that your Firefox seems to be crashing when you open it. Please perform the following steps to give us a crash report ID that helps us find out more about the cause of the crash.

1. On the keyboard, press [Windows] The image "Windows key" does not exist. + [R]. This should bring up a Run window that contains a text field.
2. In that text field, type %APPDATA% and press Enter. An explorer window should open.
3. From that explorer window, double-click on the Mozilla folder, then double-click on Firefox and then on Crash reports. Double-click on submitted.
4. Now, you should see a list of files that contain reports. Go to View > Arrange Icons by > Modified to get the most recent files at the top of the window.
5. Open the most recent 5 files with a text editor and copy the IDs.
6. Paste each ID with bp- into the reply window on the forums.

You can find more information and troubleshooting steps in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

bp-a76dd844-e49c-4034-ab42-4ddd42170128 bp-91d431bf-e020-4dab-ba39-5c9102170127 bp-0748e567-cc80-4718-8ac0-213bf2170127 bp-3799c3e0-e995-47a6-be58-3e9972170127 bp-2164069b-c37b-4b14-abd5-793fc2170127

I actually missed one...sorry this was the second most recent

bp-967af3eb-d386-48b1-ae40-544d32170127

Update Kaspersky. If the problem continues, disable it.

I just did that and it seems to be working!

Glad to help. Safe Surfing.